The Princeton encyclopedia of Islamic political thought

 Zaman, Muhammad Qasim; Crone, Patricia; Kadi, Wadad; Stewart, Devin J.;

Princeton, N.J. : Princeton University Press , 2013

Encyclopaedia of the Qurʼān :index volume

 McAuliffe, Jane Dammen;

Leiden : Brill , 2006

Encyclopedia of American education

 Unger, Harlow G.;

New York : Facts on file , 2001

Encyclopedia of American education

 Unger, Harlow G.;

New York : Facts on file , 2001

Encyclopedia of Muslim-American history

 Curtis, Edward E.,;

New York : : Facts On File, , 2010

Encyclopaedia of the Qurʼān :volume one A-D

 McAuliffe, Jane Dammen;

Leiden : Brill , 2001

Encyclopaedia of the Qurʼān :volume five Si-Z

 McAuliffe, Jane Dammen;

Leiden : Brill , 0

Encyclopaedia of the Qurʼān :volume two E-I

 McAuliffe, Jane Dammen;

Leiden : Brill , 2002