Tham khảo Abdu’l-Bahá

  • Smith, Peter (2000). A concise encyclopedia of the Bahá'í Faith. Oxford: Oneworld Publications. tr. 169–170. ISBN 1-85168-184-1. 
  1. ↑ Chambers Biographical Dictionary, ISBN 0-550-18022-2, page 2
  2. 1 2 Bausani, Alessandro (1989), “‘Abd-al-Bahā’: Life and work”, Encyclopædia Iranica. 
  3. ↑ Smith 2000, tr. 14–20
  4. 1 2 3 4 Firuz Kazemzadeh. “‘Abdu’l-Bahá ‘Abbás (1844–1921)”. Trong Robert Stockman. Bahá’í Encyclopedia Project. 
  5. ↑ Smith 2000, tr. 45–52
  6. ↑ Smith 2000, tr. 56–58
  7. ↑ Smith 2000, tr. 44