BibTeX:
@incollection{Various,
  author = {Various},
  title = {The King and the Gardener – a story told by ‘Abdu’l-Baha},
  booktitle = {Baha'i Stories Blog},
  url = {https://bahaistories.blogspot.com/2014/06/the-king-and-gardener-story-told-by.html},
}

APA:
Various. The King and the Gardener – a story told by ‘Abdu’l-Baha. In *Baha'i Stories Blog*.

MLA:
Various. "The King and the Gardener – a story told by ‘Abdu’l-Baha." *Baha'i Stories Blog*, n.d..

Chicago:
Various. "The King and the Gardener – a story told by ‘Abdu’l-Baha." In *Baha'i Stories Blog*, n.d..