BibTeX:
@incollection{Various,
  author = {Various},
  title = {The Youthful Sage of Baghdád},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/abdul-baha-childhood},
}

APA:
Various. The Youthful Sage of Baghdád. In *bahaistories.com archive*.

MLA:
Various. "The Youthful Sage of Baghdád." *bahaistories.com archive*, n.d..

Chicago:
Various. "The Youthful Sage of Baghdád." In *bahaistories.com archive*, n.d..