BibTeX:
@incollection{Various,
  author = {Various},
  title = {Speak and Write with Moderation},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/moderation},
}

APA:
Various. Speak and Write with Moderation. In *bahaistories.com archive*.

MLA:
Various. "Speak and Write with Moderation." *bahaistories.com archive*, n.d..

Chicago:
Various. "Speak and Write with Moderation." In *bahaistories.com archive*, n.d..