BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Man Who Did Not Forget},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2021/01/the-man-who-did-not-forget_7.html},
}

APA:
Various. The Man Who Did Not Forget. In *Baha'i Stories for Children*.

MLA:
Various. "The Man Who Did Not Forget." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "The Man Who Did Not Forget." In *Baha'i Stories for Children*, n.d..