BibTeX:
@incollection{Various,
  author = {Various},
  title = {How the death warrant for the Báb was obtained from three leading priests in Tabriz},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2014/05/obtaining-death-warrant-for-bab-from.html},
}

APA:
Various. How the death warrant for the Báb was obtained from three leading priests in Tabriz. In *Baha'i Stories Blog*.

MLA:
Various. "How the death warrant for the Báb was obtained from three leading priests in Tabriz." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "How the death warrant for the Báb was obtained from three leading priests in Tabriz." In *Baha'i Stories Blog*, n.d..