BibTeX:
@incollection{Various,
  author = {Various},
  title = {The gates of the Akka prison were finally opened for Bahá’u’lláh, His},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/selfless},
}

APA:
Various. The gates of the Akka prison were finally opened for Bahá’u’lláh, His. In *bahaistories.com archive*.

MLA:
Various. "The gates of the Akka prison were finally opened for Bahá’u’lláh, His." *bahaistories.com archive*, n.d..

Chicago:
Various. "The gates of the Akka prison were finally opened for Bahá’u’lláh, His." In *bahaistories.com archive*, n.d..