BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {William Sutherland Maxwell},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/william-sutherland-maxwell/},
}

APA:
Bahá'í Chronicles editors. William Sutherland Maxwell. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "William Sutherland Maxwell." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "William Sutherland Maxwell." In *Bahá'í Chronicles*, n.d..