BibTeX:
@incollection{Various,
  author = {Various},
  title = {Ruhiyyih Khanum’s first encounter with Shoghi Effendi},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/10/ruhhiy-khanums-first-encounter-with.html},
}

APA:
Various. Ruhiyyih Khanum’s first encounter with Shoghi Effendi. In *Baha'i Stories Blog*.

MLA:
Various. "Ruhiyyih Khanum’s first encounter with Shoghi Effendi." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Ruhiyyih Khanum’s first encounter with Shoghi Effendi." In *Baha'i Stories Blog*, n.d..