BibTeX:
@incollection{Various,
  author = {Various},
  title = {On August 20th there arrived at Green Acre a young man, dishevelled, tremulous},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/transformation},
}

APA:
Various. On August 20th there arrived at Green Acre a young man, dishevelled, tremulous. In *bahaistories.com archive*.

MLA:
Various. "On August 20th there arrived at Green Acre a young man, dishevelled, tremulous." *bahaistories.com archive*, n.d..

Chicago:
Various. "On August 20th there arrived at Green Acre a young man, dishevelled, tremulous." In *bahaistories.com archive*, n.d..