BibTeX:
@incollection{Various,
  author = {Various},
  title = {An example of how ‘Abdu’l-Baha treated an unfriendly Christian missionary in ‘Akka},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/05/an-example-of-how-abdul-baha-treated.html},
}

APA:
Various. An example of how ‘Abdu’l-Baha treated an unfriendly Christian missionary in ‘Akka. In *Baha'i Stories Blog*.

MLA:
Various. "An example of how ‘Abdu’l-Baha treated an unfriendly Christian missionary in ‘Akka." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "An example of how ‘Abdu’l-Baha treated an unfriendly Christian missionary in ‘Akka." In *Baha'i Stories Blog*, n.d..