BibTeX:
@incollection{Various,
  author = {Various},
  title = {circa 1841, Karbilá: a disciple of Siyyid Kázim describes what happened when the Báb made…},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2019/05/circa-1841-karbila-disciple-of-siyyid.html},
}

APA:
Various. circa 1841, Karbilá: a disciple of Siyyid Kázim describes what happened when the Báb made…. In *Baha'i Stories Blog*.

MLA:
Various. "circa 1841, Karbilá: a disciple of Siyyid Kázim describes what happened when the Báb made…." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "circa 1841, Karbilá: a disciple of Siyyid Kázim describes what happened when the Báb made…." In *Baha'i Stories Blog*, n.d..