BibTeX:
@incollection{Various,
  author = {Various},
  title = {‘Abdu’l-Bahá returned to the same theme the next day when speaking},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/peace},
}

APA:
Various. ‘Abdu’l-Bahá returned to the same theme the next day when speaking. In *bahaistories.com archive*.

MLA:
Various. "‘Abdu’l-Bahá returned to the same theme the next day when speaking." *bahaistories.com archive*, n.d..

Chicago:
Various. "‘Abdu’l-Bahá returned to the same theme the next day when speaking." In *bahaistories.com archive*, n.d..