BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Báb, during his life, had a certain follower who was specially devoted to him},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/abdul-baha-engagement},
}

APA:
Various. The Báb, during his life, had a certain follower who was specially devoted to him. In *bahaistories.com archive*.

MLA:
Various. "The Báb, during his life, had a certain follower who was specially devoted to him." *bahaistories.com archive*, n.d..

Chicago:
Various. "The Báb, during his life, had a certain follower who was specially devoted to him." In *bahaistories.com archive*, n.d..