BibTeX:
@incollection{Various,
  author = {Various},
  title = {Stories from the childhood of Shoghi Effendi},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2021/07/stories-from-childhood-of-shoghi-effendi.html},
}

APA:
Various. Stories from the childhood of Shoghi Effendi. In *Baha'i Stories for Children*.

MLA:
Various. "Stories from the childhood of Shoghi Effendi." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "Stories from the childhood of Shoghi Effendi." In *Baha'i Stories for Children*, n.d..