BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {‘Abdu’l-Bahá Abbas},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/abdul-baha-abbas/},
}

APA:
Bahá'í Chronicles editors. ‘Abdu’l-Bahá Abbas. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "‘Abdu’l-Bahá Abbas." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "‘Abdu’l-Bahá Abbas." In *Bahá'í Chronicles*, n.d..