BibTeX:
@incollection{Various,
  author = {Various},
  title = {A Friend Lost at Smyrna},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/sick-caring},
}

APA:
Various. A Friend Lost at Smyrna. In *bahaistories.com archive*.

MLA:
Various. "A Friend Lost at Smyrna." *bahaistories.com archive*, n.d..

Chicago:
Various. "A Friend Lost at Smyrna." In *bahaistories.com archive*, n.d..