BibTeX:
@incollection{NabliAam1932,
  author = {Nabíl-i-A'ẓam},
  title = {The Boy Who Already Knew},
  booktitle = {The Dawn-Breakers},
  year = {1932},
  publisher = {Bahá'í Publishing Trust},
  url = {https://bahai-library.com/nabil_dawnbreakers},
}

APA:
Nabíl-i-A'ẓam. (1932). The Boy Who Already Knew. In *The Dawn-Breakers*. Bahá'í Publishing Trust.

MLA:
Nabíl-i-A'ẓam. "The Boy Who Already Knew." *The Dawn-Breakers*, Bahá'í Publishing Trust, 1932.

Chicago:
Nabíl-i-A'ẓam. "The Boy Who Already Knew." In *The Dawn-Breakers*, Bahá'í Publishing Trust, 1932.