BibTeX:
@incollection{Various,
  author = {Various},
  title = {The sudden arrest of the Báb and its agonizing impact on His wife – as recalled by…},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/01/the-sudden-arrest-of-bab-and-its.html},
}

APA:
Various. The sudden arrest of the Báb and its agonizing impact on His wife – as recalled by…. In *Baha'i Stories Blog*.

MLA:
Various. "The sudden arrest of the Báb and its agonizing impact on His wife – as recalled by…." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The sudden arrest of the Báb and its agonizing impact on His wife – as recalled by…." In *Baha'i Stories Blog*, n.d..