BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mirza Mahmud was a youth when he arrived in Baghdad from Kashan},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/poor},
}

APA:
Various. Mirza Mahmud was a youth when he arrived in Baghdad from Kashan. In *bahaistories.com archive*.

MLA:
Various. "Mirza Mahmud was a youth when he arrived in Baghdad from Kashan." *bahaistories.com archive*, n.d..

Chicago:
Various. "Mirza Mahmud was a youth when he arrived in Baghdad from Kashan." In *bahaistories.com archive*, n.d..