BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Grief of Nabíl-i-A'ẓam},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/suicide},
}

APA:
Various. The Grief of Nabíl-i-A'ẓam. In *bahaistories.com archive*.

MLA:
Various. "The Grief of Nabíl-i-A'ẓam." *bahaistories.com archive*, n.d..

Chicago:
Various. "The Grief of Nabíl-i-A'ẓam." In *bahaistories.com archive*, n.d..