BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {Forty Years of Service in ‘Akká},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/husayn-aqay-i-tabrizi/},
}

APA:
Bahá'í Chronicles editors. Forty Years of Service in ‘Akká. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "Forty Years of Service in ‘Akká." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "Forty Years of Service in ‘Akká." In *Bahá'í Chronicles*, n.d..