Cita APA (7a ed.)

Collins, W. P. (1988). A classification for the Bahá'í Faith. Bahá'í World Centre Library.

Cita Chicago Style (17a ed.)

Collins, William P. A Classification for the Bahá'í Faith. Haifa: Bahá'í World Centre Library, 1988.

Cita MLA (9a ed.)

Collins, William P. A Classification for the Bahá'í Faith. Bahá'í World Centre Library, 1988.