BibTeX:
@incollection{Various,
  author = {Various},
  title = {Prison walls themselves did not obscure the happiness in the heart of ‘Abdu’l-Bahá},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/happiness},
}

APA:
Various. Prison walls themselves did not obscure the happiness in the heart of ‘Abdu’l-Bahá. In *bahaistories.com archive*.

MLA:
Various. "Prison walls themselves did not obscure the happiness in the heart of ‘Abdu’l-Bahá." *bahaistories.com archive*, n.d..

Chicago:
Various. "Prison walls themselves did not obscure the happiness in the heart of ‘Abdu’l-Bahá." In *bahaistories.com archive*, n.d..