BibTeX:
@incollection{Various,
  author = {Various},
  title = {Siyyid Kázim Visits the Báb in Karbilá},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/06/circa-1841-meeting-between-bab-and-his.html},
}

APA:
Various. Siyyid Kázim Visits the Báb in Karbilá. In *Baha'i Stories Blog*.

MLA:
Various. "Siyyid Kázim Visits the Báb in Karbilá." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Siyyid Kázim Visits the Báb in Karbilá." In *Baha'i Stories Blog*, n.d..