BibTeX:
@incollection{Various,
  author = {Various},
  title = {Copying the Tablets of the Báb},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/abdul-baha-childhood},
}

APA:
Various. Copying the Tablets of the Báb. In *bahaistories.com archive*.

MLA:
Various. "Copying the Tablets of the Báb." *bahaistories.com archive*, n.d..

Chicago:
Various. "Copying the Tablets of the Báb." In *bahaistories.com archive*, n.d..