BibTeX:
@incollection{BahyyihKhnum1982,
  author = {Bahíyyih Khánum},
  title = {The Key of the Holy Tomb},
  booktitle = {Bahíyyih Khánum},
  year = {1982},
  pages = {Part V, no. 29},
  url = {https://www.gutenberg.org/cache/epub/19242/pg19242-images.html},
}

APA:
Bahíyyih Khánum. (1982). The Key of the Holy Tomb. In *Bahíyyih Khánum* (p. Part V, no. 29).

MLA:
Bahíyyih Khánum. "The Key of the Holy Tomb." *Bahíyyih Khánum*, 1982, p. Part V, no. 29.

Chicago:
Bahíyyih Khánum. "The Key of the Holy Tomb." In *Bahíyyih Khánum*, Part V, no. 29. 1982.