BibTeX:
@incollection{Various,
  author = {Various},
  title = {A servant who had accompanied my brother overheard a part of this despatch read},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/bahaullah-exile},
}

APA:
Various. A servant who had accompanied my brother overheard a part of this despatch read. In *bahaistories.com archive*.

MLA:
Various. "A servant who had accompanied my brother overheard a part of this despatch read." *bahaistories.com archive*, n.d..

Chicago:
Various. "A servant who had accompanied my brother overheard a part of this despatch read." In *bahaistories.com archive*, n.d..