BibTeX:
@incollection{Various,
  author = {Various},
  title = {Speaking in Stuttgart Despite Illness},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/health},
}

APA:
Various. Speaking in Stuttgart Despite Illness. In *bahaistories.com archive*.

MLA:
Various. "Speaking in Stuttgart Despite Illness." *bahaistories.com archive*, n.d..

Chicago:
Various. "Speaking in Stuttgart Despite Illness." In *bahaistories.com archive*, n.d..