BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Ustád Báqir and Ustád Aḥmad},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/ustad-baqir-and-ustad-a%e1%b8%a5mad/},
}

APA:
Bahá'í Chronicles editors. Ustád Báqir and Ustád Aḥmad. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Ustád Báqir and Ustád Aḥmad." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Ustád Báqir and Ustád Aḥmad." In *Bahá'í Chronicles*, n.d..