BibTeX:
@incollection{Various,
  author = {Various},
  title = {During the few years of his adult life, Mirza Mihdi had acted as an amanuensis},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/mirza-mihdi},
}

APA:
Various. During the few years of his adult life, Mirza Mihdi had acted as an amanuensis. In *bahaistories.com archive*.

MLA:
Various. "During the few years of his adult life, Mirza Mihdi had acted as an amanuensis." *bahaistories.com archive*, n.d..

Chicago:
Various. "During the few years of his adult life, Mirza Mihdi had acted as an amanuensis." In *bahaistories.com archive*, n.d..