BibTeX:
@incollection{Various,
  author = {Various},
  title = {An Ayyám-i-Há Feast at Mazra‘ih},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/ayyam-i-ha},
}

APA:
Various. An Ayyám-i-Há Feast at Mazra‘ih. In *bahaistories.com archive*.

MLA:
Various. "An Ayyám-i-Há Feast at Mazra‘ih." *bahaistories.com archive*, n.d..

Chicago:
Various. "An Ayyám-i-Há Feast at Mazra‘ih." In *bahaistories.com archive*, n.d..