BibTeX:
@incollection{OnbehalfofShoghiEffendi1982,
  author = {On behalf of Shoghi Effendi},
  title = {A Blessing to Others},
  booktitle = {Bahíyyih Khánum},
  year = {1982},
  pages = {Part IV, no. 24},
  url = {https://www.gutenberg.org/cache/epub/19242/pg19242-images.html},
}

APA:
On behalf of Shoghi Effendi. (1982). A Blessing to Others. In *Bahíyyih Khánum* (p. Part IV, no. 24).

MLA:
On behalf of Shoghi Effendi. "A Blessing to Others." *Bahíyyih Khánum*, 1982, p. Part IV, no. 24.

Chicago:
On behalf of Shoghi Effendi. "A Blessing to Others." In *Bahíyyih Khánum*, Part IV, no. 24. 1982.