BibTeX:
@incollection{AdibTaherzadeh1987,
  author = {Adib Taherzadeh},
  title = {The Most Mighty Branch: Bahá'u'lláh's Book of the Covenant},
  booktitle = {The Revelation of Bahá'u'lláh, Volume 4},
  year = {1987},
  publisher = {George Ronald},
  url = {https://bahai-library.com/taherzadeh_revelation_bahaullah},
}

APA:
Adib Taherzadeh. (1987). The Most Mighty Branch: Bahá'u'lláh's Book of the Covenant. In *The Revelation of Bahá'u'lláh, Volume 4*. George Ronald.

MLA:
Adib Taherzadeh. "The Most Mighty Branch: Bahá'u'lláh's Book of the Covenant." *The Revelation of Bahá'u'lláh, Volume 4*, George Ronald, 1987.

Chicago:
Adib Taherzadeh. "The Most Mighty Branch: Bahá'u'lláh's Book of the Covenant." In *The Revelation of Bahá'u'lláh, Volume 4*, George Ronald, 1987.