BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Fate of the Regiment That Shot the Báb},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/08/what-happened-to-regiment-who-executed.html},
}

APA:
Various. The Fate of the Regiment That Shot the Báb. In *Baha'i Stories Blog*.

MLA:
Various. "The Fate of the Regiment That Shot the Báb." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The Fate of the Regiment That Shot the Báb." In *Baha'i Stories Blog*, n.d..