Mottahedeh, Roy P., author
I.B. Tauris Publishers, 2001
Buku Teks
Watt, William Montgomery, author
Edinburg University Press, 1980
Buku Teks
Ibrahim M. Abu-Rabi
BlackWell Publishing, 2006
Buku Teks
Adiwarman A. Karim, 1963-, author
RajaGrafindo Persada, 2005
Buku Teks
Prytherch, Ray, compiler
Gower, 1987
Buku Referensi