BibTeX:
@incollection{Various,
  author = {Various},
  title = {The story of how Baha’u’llah’s Father received the title of “Buzurg” - “the Great” – from the King of Persia},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2016/07/the-story-of-how-bahaullahs-father.html},
}

APA:
Various. The story of how Baha’u’llah’s Father received the title of “Buzurg” - “the Great” – from the King of Persia. In *Baha'i Stories Blog*.

MLA:
Various. "The story of how Baha’u’llah’s Father received the title of “Buzurg” - “the Great” – from the King of Persia." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The story of how Baha’u’llah’s Father received the title of “Buzurg” - “the Great” – from the King of Persia." In *Baha'i Stories Blog*, n.d..