BibTeX:
@incollection{Various,
  author = {Various},
  title = {There was once a lover who had sighed for long years in separation},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/watchman},
}

APA:
Various. There was once a lover who had sighed for long years in separation. In *bahaistories.com archive*.

MLA:
Various. "There was once a lover who had sighed for long years in separation." *bahaistories.com archive*, n.d..

Chicago:
Various. "There was once a lover who had sighed for long years in separation." In *bahaistories.com archive*, n.d..