BibTeX:
@incollection{Various,
  author = {Various},
  title = {Here’s a story of Ugo Giachery (a Hand of the Cause) who went through the…},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/repentance},
}

APA:
Various. Here’s a story of Ugo Giachery (a Hand of the Cause) who went through the…. In *bahaistories.com archive*.

MLA:
Various. "Here’s a story of Ugo Giachery (a Hand of the Cause) who went through the…." *bahaistories.com archive*, n.d..

Chicago:
Various. "Here’s a story of Ugo Giachery (a Hand of the Cause) who went through the…." In *bahaistories.com archive*, n.d..