BibTeX:
@incollection{Various,
  author = {Various},
  title = {Zamenhof, Creator of Esperanto},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/esperanto},
}

APA:
Various. Zamenhof, Creator of Esperanto. In *bahaistories.com archive*.

MLA:
Various. "Zamenhof, Creator of Esperanto." *bahaistories.com archive*, n.d..

Chicago:
Various. "Zamenhof, Creator of Esperanto." In *bahaistories.com archive*, n.d..