BibTeX:
@incollection{MrzHabbullhAfnn2008,
  author = {Mírzá Habíbu'lláh Afnán},
  title = {A Thousand Lamps and a Single Lamp},
  booktitle = {The Genesis of the Bábí-Bahá'í Faiths in Shíráz and Fárs},
  year = {2008},
  publisher = {Brill},
  pages = {20-22},
  url = {https://bahai-library.org/pdf/a/afnan_rabbani_genesis_faiths.pdf},
}

APA:
Mírzá Habíbu'lláh Afnán. (2008). A Thousand Lamps and a Single Lamp. In *The Genesis of the Bábí-Bahá'í Faiths in Shíráz and Fárs* (p. 20-22). Brill.

MLA:
Mírzá Habíbu'lláh Afnán. "A Thousand Lamps and a Single Lamp." *The Genesis of the Bábí-Bahá'í Faiths in Shíráz and Fárs*, Brill, 2008, p. 20-22.

Chicago:
Mírzá Habíbu'lláh Afnán. "A Thousand Lamps and a Single Lamp." In *The Genesis of the Bábí-Bahá'í Faiths in Shíráz and Fárs*, 20-22. Brill, 2008.