Kazemzadeh 2009 Kazemzadeh, Firuz, ‘Abdu’l-Bahá ‘Abbás (1844–1921), Bahá’í Encyclopedia Project, Evanston, IL: National Spiritual Assembly of the Bahá’ís of the United States, 2009 [2012-03-19], (原始内容存档于2018-10-04).
Smith 2000,第14–20頁 Smith, Peter, `Abdu'l-Bahá(PDF), A concise encyclopedia of the Bahá'í Faith, Oxford: Oneworld Publications, 2000, ISBN 1-85168-184-1, (原始内容(PDF)存档于2011-01-01).
Smith 2000,第255頁 Smith, Peter, `Abdu'l-Bahá(PDF), A concise encyclopedia of the Bahá'í Faith, Oxford: Oneworld Publications, 2000, ISBN 1-85168-184-1, (原始内容(PDF)存档于2011-01-01).
Smith 2000,第14–20頁 Smith, Peter, `Abdu'l-Bahá(PDF), A concise encyclopedia of the Bahá'í Faith, Oxford: Oneworld Publications, 2000, ISBN 1-85168-184-1, (原始内容(PDF)存档于2011-01-01).
Kazemzadeh 2009 Kazemzadeh, Firuz, ‘Abdu’l-Bahá ‘Abbás (1844–1921), Bahá’í Encyclopedia Project, Evanston, IL: National Spiritual Assembly of the Bahá’ís of the United States, 2009 [2012-03-19], (原始内容存档于2018-10-04).
Smith 2000,第255頁 Smith, Peter, `Abdu'l-Bahá(PDF), A concise encyclopedia of the Bahá'í Faith, Oxford: Oneworld Publications, 2000, ISBN 1-85168-184-1, (原始内容(PDF)存档于2011-01-01).