BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mulla Husayn is led to Shiraz in his quest for the Promised One},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/05/how-mulla-husayn-was-led-to-shiraz-in.html},
}

APA:
Various. Mulla Husayn is led to Shiraz in his quest for the Promised One. In *Baha'i Stories Blog*.

MLA:
Various. "Mulla Husayn is led to Shiraz in his quest for the Promised One." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Mulla Husayn is led to Shiraz in his quest for the Promised One." In *Baha'i Stories Blog*, n.d..