BibTeX:
@incollection{Various,
  author = {Various},
  title = {A Silence in the War-Time Diaries},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/anxiety},
}

APA:
Various. A Silence in the War-Time Diaries. In *bahaistories.com archive*.

MLA:
Various. "A Silence in the War-Time Diaries." *bahaistories.com archive*, n.d..

Chicago:
Various. "A Silence in the War-Time Diaries." In *bahaistories.com archive*, n.d..