BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Master Runs Up the Stairs},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2018/05/an-example-of-abdul-baha-drawing-from.html},
}

APA:
Various. The Master Runs Up the Stairs. In *Baha'i Stories Blog*.

MLA:
Various. "The Master Runs Up the Stairs." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The Master Runs Up the Stairs." In *Baha'i Stories Blog*, n.d..