BibTeX:
@incollection{Various,
  author = {Various},
  title = {The local Opera House had been rented for Abu'l-Fadl's talks and it was packed},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/ego},
}

APA:
Various. The local Opera House had been rented for Abu'l-Fadl's talks and it was packed. In *bahaistories.com archive*.

MLA:
Various. "The local Opera House had been rented for Abu'l-Fadl's talks and it was packed." *bahaistories.com archive*, n.d..

Chicago:
Various. "The local Opera House had been rented for Abu'l-Fadl's talks and it was packed." In *bahaistories.com archive*, n.d..