BibTeX:
@incollection{Various,
  author = {Various},
  title = {I wish to tell you the story of two martyrs; one was a Persian},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/martyrs},
}

APA:
Various. I wish to tell you the story of two martyrs; one was a Persian. In *bahaistories.com archive*.

MLA:
Various. "I wish to tell you the story of two martyrs; one was a Persian." *bahaistories.com archive*, n.d..

Chicago:
Various. "I wish to tell you the story of two martyrs; one was a Persian." In *bahaistories.com archive*, n.d..