BibTeX:
@incollection{Various,
  author = {Various},
  title = {Even during those crowded days in London the Master never appeared},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/peacefulness},
}

APA:
Various. Even during those crowded days in London the Master never appeared. In *bahaistories.com archive*.

MLA:
Various. "Even during those crowded days in London the Master never appeared." *bahaistories.com archive*, n.d..

Chicago:
Various. "Even during those crowded days in London the Master never appeared." In *bahaistories.com archive*, n.d..