↑ Schulenberg, David. Music of the Baroque. New York: Oxford University Press, 2001. tr. 72.. Trích: "(…) to determine the key of a Baroque work one must always analyze its tonal structure rather than rely on the key signature."
↑ Cooper, David. The Petrie Collection of the Ancient Music of Ireland. Cork: Cork University Press, 2005. tr. 22. Trích: "In a few cases Petrie has given what is clearly a modal melody a key signature which suggests that it is actally in a minor key. For example, Banish Misfortune is presented in D minor, although it is clearly in the Dorian mode."
1 2 3 Jones, George Thaddeus. 1974. Music Theory: The Fundamental Concepts of Tonal Music Including Notation, Terminology, and Harmony, tr. 35. Barnes & Noble Outline Series 137. New York, Hagerstown, San Francisco, Luân Đôn: Barnes & Noble. ISBN 9780064601375.
↑ Kennedy, Michael. 1994. "Key-Signature". Oxford Dictionary of Music, Ấn bản 2, Joyce Bourne. Oxford and New York: Oxford University Press. ISBN 0-19-869162-9.
↑ "Key Signature", Harvard Dictionary of Music, Ấn bản 2. [cần số trang]
↑ "Partial Signature", Harvard Dictionary of Music, Ấn bản 2. [cần số trang]
