BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Doctor Who Wrote a Little Book},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/john-esslemont/},
}

APA:
Bahá'í Chronicles editors. The Doctor Who Wrote a Little Book. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Doctor Who Wrote a Little Book." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Doctor Who Wrote a Little Book." In *Bahá'í Chronicles*, n.d..