Esslemont, J. E. (1974). Baha'u'llah and the new era: An introduction to the Baha'i faith (4th rev. paper ed.). Baha'i Pub. Trust.
Chicago-referens (17:e uppl.)Esslemont, J. E. Baha'u'llah and the New Era: An Introduction to the Baha'i Faith. 4th rev. paper ed. Wilmette, Ill: Baha'i Pub. Trust, 1974.
MLA-referens (9:e uppl.)Esslemont, J. E. Baha'u'llah and the New Era: An Introduction to the Baha'i Faith. 4th rev. paper ed. Baha'i Pub. Trust, 1974.
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