BibTeX:
@incollection{BahChronicleseditors,
  author = {Bahá'í Chronicles editors},
  title = {The Man Who Kept Smiling},
  booktitle = {Bahá'í Chronicles},
  url = {https://bahaichronicles.org/ismullahul-asdaq-mulla-%e1%b9%a3adiq/},
}

APA:
Bahá'í Chronicles editors. The Man Who Kept Smiling. In *Bahá'í Chronicles*.

MLA:
Bahá'í Chronicles editors. "The Man Who Kept Smiling." *Bahá'í Chronicles*, n.d..

Chicago:
Bahá'í Chronicles editors. "The Man Who Kept Smiling." In *Bahá'í Chronicles*, n.d..