BibTeX:
@incollection{Various,
  author = {Various},
  title = {Seven Visits to the Báb in Tabríz},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/mulla-husayn},
}

APA:
Various. Seven Visits to the Báb in Tabríz. In *bahaistories.com archive*.

MLA:
Various. "Seven Visits to the Báb in Tabríz." *bahaistories.com archive*, n.d..

Chicago:
Various. "Seven Visits to the Báb in Tabríz." In *bahaistories.com archive*, n.d..