BibTeX:
@incollection{NabliAzam1932,
  author = {Nabíl-i-A'zam},
  title = {The Prince Who Sent His Wildest Horse},
  booktitle = {The Dawn-Breakers},
  year = {1932},
  publisher = {Bahá'í Publishing Trust},
}

APA:
Nabíl-i-A'zam. (1932). The Prince Who Sent His Wildest Horse. In *The Dawn-Breakers*. Bahá'í Publishing Trust.

MLA:
Nabíl-i-A'zam. "The Prince Who Sent His Wildest Horse." *The Dawn-Breakers*, Bahá'í Publishing Trust, 1932.

Chicago:
Nabíl-i-A'zam. "The Prince Who Sent His Wildest Horse." In *The Dawn-Breakers*, Bahá'í Publishing Trust, 1932.