BibTeX:
@incollection{Various,
  author = {Various},
  title = {The effect of ‘Abdu’l-Bahá on those who heard Him that day became},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/unity-religion},
}

APA:
Various. The effect of ‘Abdu’l-Bahá on those who heard Him that day became. In *bahaistories.com archive*.

MLA:
Various. "The effect of ‘Abdu’l-Bahá on those who heard Him that day became." *bahaistories.com archive*, n.d..

Chicago:
Various. "The effect of ‘Abdu’l-Bahá on those who heard Him that day became." In *bahaistories.com archive*, n.d..