BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Unveiling at Badasht},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2017/07/1848-bahaullah-describes-consternation.html},
}

APA:
Various. The Unveiling at Badasht. In *Baha'i Stories Blog*.

MLA:
Various. "The Unveiling at Badasht." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The Unveiling at Badasht." In *Baha'i Stories Blog*, n.d..