BibTeX:
@incollection{Various,
  author = {Various},
  title = {Serving His Guests Himself},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/humility},
}

APA:
Various. Serving His Guests Himself. In *bahaistories.com archive*.

MLA:
Various. "Serving His Guests Himself." *bahaistories.com archive*, n.d..

Chicago:
Various. "Serving His Guests Himself." In *bahaistories.com archive*, n.d..