BibTeX:
@incollection{Various,
  author = {Various},
  title = {‘Abdu’l-Baha’s visit to Montreal – Maxwell House},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2015/08/abdul-bahas-visit-to-montreal-maxwell.html},
}

APA:
Various. ‘Abdu’l-Baha’s visit to Montreal – Maxwell House. In *Baha'i Stories Blog*.

MLA:
Various. "‘Abdu’l-Baha’s visit to Montreal – Maxwell House." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "‘Abdu’l-Baha’s visit to Montreal – Maxwell House." In *Baha'i Stories Blog*, n.d..