BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Errand for Five Kráns},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/03/abdul-baha-tells-story-about-incident.html},
}

APA:
Various. The Errand for Five Kráns. In *Baha'i Stories Blog*.

MLA:
Various. "The Errand for Five Kráns." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The Errand for Five Kráns." In *Baha'i Stories Blog*, n.d..