The Oxford encyclopedia of the Islamic world
The Encyclopedia of religion
Ensiklopedi Nurcholish Madjid : pemikiran Islam di kanvas peradaban jilid 1-4
Encyclopaedia of the Qur'an : index Volume
Encyclopaedia of the Qur'an : volume one A-D
Encyclopaedia of the Qur'an : volume four P-Sh
Encyclopaedia of the Qur'an : volume two E-I
Encyclopaedia of the Qur'an : volume three J-O
Encyclopaedia of the Qur'an : volume five Si-Z
Ensiklopedia Nahdlatul Ulama : sejarah, tokoh, dan khazanah pesantren