BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Mujtahid Who Knelt in Baghdád},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/nabil-i-akbar-aqa-mu%e1%b8%a5ammad-i-qaini/},
}

APA:
Bahá'í Chronicles editors. The Mujtahid Who Knelt in Baghdád. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Mujtahid Who Knelt in Baghdád." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Mujtahid Who Knelt in Baghdád." In *Bahá'í Chronicles*, n.d..