BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Ḥájí Amín, Trustee of the Ḥuqúqu’lláh},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/haji-mirza-abul-hasan-ardikani-haji-amin/},
}

APA:
Bahá'í Chronicles editors. Ḥájí Amín, Trustee of the Ḥuqúqu’lláh. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Ḥájí Amín, Trustee of the Ḥuqúqu’lláh." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Ḥájí Amín, Trustee of the Ḥuqúqu’lláh." In *Bahá'í Chronicles*, n.d..