BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Old Gardener and the King},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2022/03/the-old-man-and-king-story-told-by.html},
}

APA:
Various. The Old Gardener and the King. In *Baha'i Stories for Children*.

MLA:
Various. "The Old Gardener and the King." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "The Old Gardener and the King." In *Baha'i Stories for Children*, n.d..