BibTeX:
@incollection{Various,
  author = {Various},
  title = {Mullá Husayn Finds the Hidden Treasure},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2017/03/mulla-husayn-finds-gods-hidden-treasure.html},
}

APA:
Various. Mullá Husayn Finds the Hidden Treasure. In *Baha'i Stories Blog*.

MLA:
Various. "Mullá Husayn Finds the Hidden Treasure." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Mullá Husayn Finds the Hidden Treasure." In *Baha'i Stories Blog*, n.d..