BibTeX:
@incollection{AbdulBaha1912,
  author = {'Abdu'l-Baha},
  title = {He Made Good Broth},
  booktitle = {'Abdu'l-Baha in London},
  year = {1912},
  publisher = {Baha'i Publishing Trust},
}

APA:
'Abdu'l-Baha. (1912). He Made Good Broth. In *'Abdu'l-Baha in London*. Baha'i Publishing Trust.

MLA:
'Abdu'l-Baha. "He Made Good Broth." *'Abdu'l-Baha in London*, Baha'i Publishing Trust, 1912.

Chicago:
'Abdu'l-Baha. "He Made Good Broth." In *'Abdu'l-Baha in London*, Baha'i Publishing Trust, 1912.