BibTeX:
@incollection{AdibTaherzadeh1983,
  author = {Adib Taherzadeh},
  title = {Ḥájí Amín, the Trusted One},
  booktitle = {The Revelation of Bahá'u'lláh (Vol. 3)},
  year = {1983},
  publisher = {George Ronald},
}

APA:
Adib Taherzadeh. (1983). Ḥájí Amín, the Trusted One. In *The Revelation of Bahá'u'lláh (Vol. 3)*. George Ronald.

MLA:
Adib Taherzadeh. "Ḥájí Amín, the Trusted One." *The Revelation of Bahá'u'lláh (Vol. 3)*, George Ronald, 1983.

Chicago:
Adib Taherzadeh. "Ḥájí Amín, the Trusted One." In *The Revelation of Bahá'u'lláh (Vol. 3)*, George Ronald, 1983.