BibTeX:
@incollection{Various,
  author = {Various},
  title = {Eight-year-old ‘Abdu’l-Bha was allowed to see Baha’u’llah while in the Síyáh-Chál},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2022/09/eight-year-old-abdul-bha-was-allowed-to.html},
}

APA:
Various. Eight-year-old ‘Abdu’l-Bha was allowed to see Baha’u’llah while in the Síyáh-Chál. In *Baha'i Stories Blog*.

MLA:
Various. "Eight-year-old ‘Abdu’l-Bha was allowed to see Baha’u’llah while in the Síyáh-Chál." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Eight-year-old ‘Abdu’l-Bha was allowed to see Baha’u’llah while in the Síyáh-Chál." In *Baha'i Stories Blog*, n.d..