BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mullá Ḥusayn's Mission to Iṣfahán},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/11/mulla-husayns-first-assignment.html},
}

APA:
Various. Mullá Ḥusayn's Mission to Iṣfahán. In *Baha'i Stories Blog*.

MLA:
Various. "Mullá Ḥusayn's Mission to Iṣfahán." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Mullá Ḥusayn's Mission to Iṣfahán." In *Baha'i Stories Blog*, n.d..