BibTeX:
@incollection{Various,
  author = {Various},
  title = {The story of the Báb},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2014/03/the-story-of-bab-by-hushman-fatheazam.html},
}

APA:
Various. The story of the Báb. In *Baha'i Stories Blog*.

MLA:
Various. "The story of the Báb." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The story of the Báb." In *Baha'i Stories Blog*, n.d..