BibTeX:
@incollection{Various,
  author = {Various},
  title = {To Ethel Rosenberg, the first English woman to embrace the Bahá’í Faith in her},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/transformation},
}

APA:
Various. To Ethel Rosenberg, the first English woman to embrace the Bahá’í Faith in her. In *bahaistories.com archive*.

MLA:
Various. "To Ethel Rosenberg, the first English woman to embrace the Bahá’í Faith in her." *bahaistories.com archive*, n.d..

Chicago:
Various. "To Ethel Rosenberg, the first English woman to embrace the Bahá’í Faith in her." In *bahaistories.com archive*, n.d..