BibTeX:
@incollection{Various,
  author = {Various},
  title = {Two Pink Roses for a Little Girl},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2015/01/two-pink-roses-for-little-girl.html},
}

APA:
Various. Two Pink Roses for a Little Girl. In *Baha'i Stories for Children*.

MLA:
Various. "Two Pink Roses for a Little Girl." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "Two Pink Roses for a Little Girl." In *Baha'i Stories for Children*, n.d..