BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Servant of God},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2019/12/the-servant-of-god.html},
}

APA:
Various. The Servant of God. In *Baha'i Stories for Children*.

MLA:
Various. "The Servant of God." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "The Servant of God." In *Baha'i Stories for Children*, n.d..