Phê bình bằng tiếng Hi Lạp

• (tiếng Pháp) Émile Bréhier, Plotin: Ennéades, Collection Budé, 1924–1938.
• (tiếng Pháp) Paul Henry và Hans-Rudolf Schwyzer (eds.), Editio maior (3 tập), Paris, Desclée de Brouwer, 1951–1973.
• (tiếng Pháp) Paul Henry và Hans-Rudolf Schwyzer (eds.), Editio minor, Oxford, Oxford Classical Text, 1964–1982.

Chuyển ngữ tiếng Anh

• Plotinus. The Enneads (dịch bởi Stephen MacKenna), London, Medici Society, 1917–1930.
• A. H. Armstrong, Plotinus. Enneads (với văn bản Hi Lạp), Loeb Classical Library, 7 tập, 1966–1988.
• Thomas Taylor, Collected Writings of Plotinus, Frome, Prometheus Trust, 1994. ISBN 1-898910-02-2 (nội dung bằng khoảng 1/2 của Enneads)

Lexica

• J. H. Sleeman và G. Pollet, Lexicon Plotinianum, Leiden, 1980.
• Roberto Radice (ed.), Lexicon II: Plotinus, Milan, Biblia, 2004. (ebook của Roberto Bombacigno)

The Life of Plotinus của Porphyry

• Porphyry, "On the Life of Plotinus and the Arrangement of his Works" in Mark Edwards (ed.), Neoplatonic Saints: The Lives of Plotinus and Proclus by their Students, Liverpool, Liverpool University Press, 2000.

Biên tập chuyển ngữ, với chú thích

• Kevin Corrigan, Reading Plotinus: A Practical Introduction to Neoplatonism, West Lafayette, Purdue University Press, 2005.
• John M. Dillon và Lloyd P. Gerson, Neoplatonic Philosophy: Introductory Readings, Hackett, 2004.

Diễn giải

• Erik Emilsson, Plotinus, New York: Routledge, 2017.
• Kevin Corrigan, Reading Plotinus. A Practical Introduction to Neoplatonism, Purdue University Press, 1995.
• Lloyd P. Gerson, Plotinus, New York, Routledge, 1994.
• LLoyd P. Gerson (ed.), The Cambridge Companion to Plotinus, Cambridge, 1996.
• Dominic J. O'Meara, Plotinus. An Introduction to the Enneads, Oxford, Clarendon Press, 1993. (Reprinted 2005)
• John M. Rist, Plotinus. The Road to Reality, Cambridge, Cambridge University Press, 1967.

Phê bình bằng tiếng Anh

• Cinzia Arruzza, Plotinus: Ennead II.5, On What Is Potentially and What Actually, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2015, ISBN 978-1-930972-63-6
• Michael Atkinson, Plotinus: Ennead V.1, On the Three Principal Hypostases, Oxford, 1983.
• Kevin Corrigan, Plotinus' Theory of Matter-Evil: Plato, Aristotle, and Alexander of Aphrodisias (II.4, II.5, III.6, I.8), Leiden, 1996.
• John N. Deck, Nature, Contemplation and the One: A Study in the Philosophy of Plotinus, University of Toronto Press, 1967; Paul Brunton Philosophical Foundation, 1991.
• John M. Dillon, H.J. Blumenthal, Plotinus: Ennead IV.3-4.29, "Problems Concerning the Soul, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2015, ISBN 978-1-930972-89-6
• Eyjólfur K. Emilsson, Steven K. Strange, Plotinus: Ennead VI.4 & VI.5: On the Presence of Being, One and the Same, Everywhere as a Whole, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2015, ISBN 978-1-930972-34-6
• Barrie Fleet, Plotinus: Ennead III.6, On the Impassivity of the Bodiless, Oxford, 1995.
• Barrie Fleet, Plotinus: Ennead IV.8, On the Descent of the Soul into Bodies, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2012. ISBN 978-1-930972-77-3
• Lloyd P. Gerson, Plotinus: Ennead V.5, That the Intelligibles are not External to the Intellect, and on the Good, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2013, ISBN 978-1-930972-85-8
• Gary M. Gurtler, SJ, Plotinus: Ennead IV.4.30-45 & IV.5, "Problems Concerning the Soul, The Enneads of Plotinus Series chỉnh sửa bởi John M. Dillon và Andrew Smith, Parmenides Publishing, 2015, ISBN 978-1-930972-69-8
• W. Helleman-Elgersma, Soul-Sisters. A Commentary on Enneads IV, 3 (27), 1–8 of Plotinus, Amsterdam, 1980.
• James Luchte, Early Greek Thought: Before the Dawn. London: Bloomsbury Publishing, 2011. ISBN 978-0567353313.
• Kieran McGroarty, Plotinus on Eudaimonia: A Commentary on Ennead I.4, Oxford, 2006.
• P. A. Meijer, Plotinus on the Good or the One (VI.9), Amsterdam, 1992.
• H. Oosthout, Modes of Knowledge and the Transcendental: An Introduction to Plotinus Ennead V.3, Amsterdam, 1991.
• J. Wilberding, Plotinus' Cosmology. A study of Ennead II. 1 (40), Oxford, 2006.
• A. M. Wolters, Plotinus on Eros (eNN. III.5), Amsterdam, 1972.

Sách của chủ nghĩa tân-Plato

• Robert M. Berchman, From Philo to Origen: Middle Platonism in Transition, Chico, Scholars Press, 1984.
• Frederick Copleston, A History of Philosophy: Vol. 1, Part 2. ISBN 0-385-00210-6
• P. Merlan, "Greek Philosophy from Plato to Plotinus" in A. H. Armstrong (ed.), The Cambridge History of Later Greek and Early Medieval Philosophy, Cambridge, 1967. ISBN 0-521-04054-X
• Pauliina Remes, Neoplatonism (Ancient Philosophies), University of California Press, 2008.
• Thomas Taylor, The fragments that remain of the lost writings of Proclus, surnamed the Platonic successor, London, 1825. (Selene Books tái bản, 1987. ISBN 0-933601-11-5)
• Richard T. Wallis, Neoplatonism and Gnosticism, University of Oklahoma, 1984. ISBN 0-7914-1337-3 vàISBN 0-7914-1338-1

Nghiên cứu về công trình của Plotinus

• R. B. Harris (ed.), Neoplatonism and Indian Thought, Albany, 1982.
• Giannis Stamatellos, Plotinus and the Presocratics. A Philosophical Study of Presocratic Influences in Plotinus' Enneads, Albany, 2008.
• N. Joseph Torchia, Plotinus, Tolma, and the Descent of Being, New York, Peter Lang, 1993. ISBN 0-8204-1768-8
• Antonia Tripolitis, The Doctrine of the Soul in the thought of Plotinus and Origen, Libra Publishers, 1978.
• M. F. Wagner (ed.), Neoplatonism and Nature. Studies in Plotinus' Enneads, Albany, 2002.