BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Nabíl-i-Akbar (Áqá Muḥammad-i-Qá’iní)},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/nabil-i-akbar-aqa-mu%e1%b8%a5ammad-i-qaini/},
}

APA:
Bahá'í Chronicles editors. Nabíl-i-Akbar (Áqá Muḥammad-i-Qá’iní). In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Nabíl-i-Akbar (Áqá Muḥammad-i-Qá’iní)." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Nabíl-i-Akbar (Áqá Muḥammad-i-Qá’iní)." In *Bahá'í Chronicles*, n.d..