BibTeX:
@incollection{AdibTaherzadeh1974,
  author = {Adib Taherzadeh},
  title = {The Words by the River: Bahá'u'lláh Reveals the Hidden Words},
  booktitle = {The Revelation of Bahá'u'lláh (Vol. 1 — Baghdád 1853-63)},
  year = {1974},
  publisher = {George Ronald},
}

APA:
Adib Taherzadeh. (1974). The Words by the River: Bahá'u'lláh Reveals the Hidden Words. In *The Revelation of Bahá'u'lláh (Vol. 1 — Baghdád 1853-63)*. George Ronald.

MLA:
Adib Taherzadeh. "The Words by the River: Bahá'u'lláh Reveals the Hidden Words." *The Revelation of Bahá'u'lláh (Vol. 1 — Baghdád 1853-63)*, George Ronald, 1974.

Chicago:
Adib Taherzadeh. "The Words by the River: Bahá'u'lláh Reveals the Hidden Words." In *The Revelation of Bahá'u'lláh (Vol. 1 — Baghdád 1853-63)*, George Ronald, 1974.