International Institute of Islamic Thought, 1997
Buku Teks
Baz, Syeikh Abdul Aziz Bin Abdullah Bin
IAIN Sumatera Utara, [date of publication not identified]
Buku Teks
Muhammad Abd Al-Marsi, author
Remaja Rosdakarya, 1991
Buku Teks
George Braziller, 1962
Buku Klasik
Azim A. Nanji, editor
Gale Research, 1996
Buku Referensi