BibTeX:
@incollection{Various,
  author = {Various},
  title = {During our sojourn in Adrianople, Bahá’u’lláh's custom was to walk only in the…},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/bahaullah-exile},
}

APA:
Various. During our sojourn in Adrianople, Bahá’u’lláh's custom was to walk only in the…. In *bahaistories.com archive*.

MLA:
Various. "During our sojourn in Adrianople, Bahá’u’lláh's custom was to walk only in the…." *bahaistories.com archive*, n.d..

Chicago:
Various. "During our sojourn in Adrianople, Bahá’u’lláh's custom was to walk only in the…." In *bahaistories.com archive*, n.d..