BibTeX:
@incollection{Various,
  author = {Various},
  title = {A cat purring beside His chair would amuse Him: this cat, He},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/abdul-baha-animals},
}

APA:
Various. A cat purring beside His chair would amuse Him: this cat, He. In *bahaistories.com archive*.

MLA:
Various. "A cat purring beside His chair would amuse Him: this cat, He." *bahaistories.com archive*, n.d..

Chicago:
Various. "A cat purring beside His chair would amuse Him: this cat, He." In *bahaistories.com archive*, n.d..