BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Ḥájí ‘Abdu’lláh Najaf-Ábádí},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/%e1%b8%a5aji-abdullah-najaf-abadi/},
}

APA:
Bahá'í Chronicles editors. Ḥájí ‘Abdu’lláh Najaf-Ábádí. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Ḥájí ‘Abdu’lláh Najaf-Ábádí." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Ḥájí ‘Abdu’lláh Najaf-Ábádí." In *Bahá'í Chronicles*, n.d..