BibTeX:
@incollection{VariousCompilers2000,
  author = {Various Compilers},
  title = {Looking for the Key: A Mulla Nasrudin Tale 'Abdu'l-Bahá Used},
  booktitle = {Stories Told by 'Abdu'l-Bahá},
  year = {2000},
  publisher = {Bahá'í Publishing Trust},
}

APA:
Various Compilers. (2000). Looking for the Key: A Mulla Nasrudin Tale 'Abdu'l-Bahá Used. In *Stories Told by 'Abdu'l-Bahá*. Bahá'í Publishing Trust.

MLA:
Various Compilers. "Looking for the Key: A Mulla Nasrudin Tale 'Abdu'l-Bahá Used." *Stories Told by 'Abdu'l-Bahá*, Bahá'í Publishing Trust, 2000.

Chicago:
Various Compilers. "Looking for the Key: A Mulla Nasrudin Tale 'Abdu'l-Bahá Used." In *Stories Told by 'Abdu'l-Bahá*, Bahá'í Publishing Trust, 2000.