BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mullá Ḥusayn Finds the Promised One},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/detachment},
}

APA:
Various. Mullá Ḥusayn Finds the Promised One. In *bahaistories.com archive*.

MLA:
Various. "Mullá Ḥusayn Finds the Promised One." *bahaistories.com archive*, n.d..

Chicago:
Various. "Mullá Ḥusayn Finds the Promised One." In *bahaistories.com archive*, n.d..