BibTeX:
@incollection{AdibTaherzadeh1983,
  author = {Adib Taherzadeh},
  title = {The Scholar of Gulpáygán},
  booktitle = {The Revelation of Bahá'u'lláh, vol. 3 (ch. 5 and Appendix II)},
  year = {1983},
  publisher = {George Ronald},
}

APA:
Adib Taherzadeh. (1983). The Scholar of Gulpáygán. In *The Revelation of Bahá'u'lláh, vol. 3 (ch. 5 and Appendix II)*. George Ronald.

MLA:
Adib Taherzadeh. "The Scholar of Gulpáygán." *The Revelation of Bahá'u'lláh, vol. 3 (ch. 5 and Appendix II)*, George Ronald, 1983.

Chicago:
Adib Taherzadeh. "The Scholar of Gulpáygán." In *The Revelation of Bahá'u'lláh, vol. 3 (ch. 5 and Appendix II)*, George Ronald, 1983.