BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Martyrdom of Mírzá Qurbán-‘Alí},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/mirza-qurban-ali/},
}

APA:
Bahá'í Chronicles editors. The Martyrdom of Mírzá Qurbán-‘Alí. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Martyrdom of Mírzá Qurbán-‘Alí." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Martyrdom of Mírzá Qurbán-‘Alí." In *Bahá'í Chronicles*, n.d..