BibTeX:
@incollection{Various,
  author = {Various},
  title = {Meeting Shoghi Effendi in Paris during the Summer of 1920},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/03/meeting-shoghi-effendi-in-paris-during.html},
}

APA:
Various. Meeting Shoghi Effendi in Paris during the Summer of 1920. In *Baha'i Stories Blog*.

MLA:
Various. "Meeting Shoghi Effendi in Paris during the Summer of 1920." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "Meeting Shoghi Effendi in Paris during the Summer of 1920." In *Baha'i Stories Blog*, n.d..