BibTeX:
@incollection{Various,
  author = {Various},
  title = {The early believers in Akká not only observed the Bahá’í Fast, but},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/fast},
}

APA:
Various. The early believers in Akká not only observed the Bahá’í Fast, but. In *bahaistories.com archive*.

MLA:
Various. "The early believers in Akká not only observed the Bahá’í Fast, but." *bahaistories.com archive*, n.d..

Chicago:
Various. "The early believers in Akká not only observed the Bahá’í Fast, but." In *bahaistories.com archive*, n.d..