BibTeX:
@incollection{Various,
  author = {Various},
  title = {Abu'l-Faḍl at the Opera House},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/ego},
}

APA:
Various. Abu'l-Faḍl at the Opera House. In *bahaistories.com archive*.

MLA:
Various. "Abu'l-Faḍl at the Opera House." *bahaistories.com archive*, n.d..

Chicago:
Various. "Abu'l-Faḍl at the Opera House." In *bahaistories.com archive*, n.d..