BibTeX:
@incollection{Various,
  author = {Various},
  title = {How Munírih Khánum Came to Marry the Master},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/abdul-baha-engagement},
}

APA:
Various. How Munírih Khánum Came to Marry the Master. In *bahaistories.com archive*.

MLA:
Various. "How Munírih Khánum Came to Marry the Master." *bahaistories.com archive*, n.d..

Chicago:
Various. "How Munírih Khánum Came to Marry the Master." In *bahaistories.com archive*, n.d..