BibTeX:
@incollection{Various,
  author = {Various},
  title = {Earlier that day ‘Abdu’l-Bahá talked about the material progress of the world},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/materialism},
}

APA:
Various. Earlier that day ‘Abdu’l-Bahá talked about the material progress of the world. In *bahaistories.com archive*.

MLA:
Various. "Earlier that day ‘Abdu’l-Bahá talked about the material progress of the world." *bahaistories.com archive*, n.d..

Chicago:
Various. "Earlier that day ‘Abdu’l-Bahá talked about the material progress of the world." In *bahaistories.com archive*, n.d..