BibTeX:
@incollection{AdibTaherzadeh1983,
  author = {Adib Taherzadeh},
  title = {A Light in the Darkest Hour: The Fire Tablet},
  booktitle = {The Revelation of Bahá'u'lláh (Vol. 3 — 'Akká, The Early Years 1868-77)},
  year = {1983},
  publisher = {George Ronald},
}

APA:
Adib Taherzadeh. (1983). A Light in the Darkest Hour: The Fire Tablet. In *The Revelation of Bahá'u'lláh (Vol. 3 — 'Akká, The Early Years 1868-77)*. George Ronald.

MLA:
Adib Taherzadeh. "A Light in the Darkest Hour: The Fire Tablet." *The Revelation of Bahá'u'lláh (Vol. 3 — 'Akká, The Early Years 1868-77)*, George Ronald, 1983.

Chicago:
Adib Taherzadeh. "A Light in the Darkest Hour: The Fire Tablet." In *The Revelation of Bahá'u'lláh (Vol. 3 — 'Akká, The Early Years 1868-77)*, George Ronald, 1983.