BibTeX:
@incollection{Various,
  author = {Various},
  title = {A rich man and a poor man lived in the same town},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/attachment},
}

APA:
Various. A rich man and a poor man lived in the same town. In *bahaistories.com archive*.

MLA:
Various. "A rich man and a poor man lived in the same town." *bahaistories.com archive*, n.d..

Chicago:
Various. "A rich man and a poor man lived in the same town." In *bahaistories.com archive*, n.d..