BibTeX:
@incollection{Various,
  author = {Various},
  title = {One of Baha’u’llah’s granddaughters remembers His loving nature…},
  booktitle = {Baha'i Stories for Children},
  url = {https://bahaistoriesforchildren.blogspot.com/2020/02/one-of-bahaullahs-granddaughters.html},
}

APA:
Various. One of Baha’u’llah’s granddaughters remembers His loving nature…. In *Baha'i Stories for Children*.

MLA:
Various. "One of Baha’u’llah’s granddaughters remembers His loving nature…." *Baha'i Stories for Children*, n.d..

Chicago:
Various. "One of Baha’u’llah’s granddaughters remembers His loving nature…." In *Baha'i Stories for Children*, n.d..