Stephens, Ian
Penguin Books, 1964
Buku Teks
Hamza, El
Islamic Literature Publishing House, 1946
Buku Teks
Berger, Morroe
Princeton University Press, 1957
Buku Teks
Qadeer, Mohammad A. (Abdul)
Routledge, 2011
Buku Teks
Yunas Samad
Sage Publications , 1995
Buku Teks