BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Disciple Left in Constantinople},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/mu%e1%b8%a5ammad-ali-sabbaq-of-yazd/},
}

APA:
Bahá'í Chronicles editors. The Disciple Left in Constantinople. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Disciple Left in Constantinople." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Disciple Left in Constantinople." In *Bahá'í Chronicles*, n.d..