by Ibrahim Abed ...[and others]
Trident Press, 2006
Buku Referensi
edited by Ibrahim Al Abel, Peter Hellyer, Paula Vine
Trident , 1997
Buku Referensi
Trident Press , 2004
Buku Referensi
Ball, Philip
[Springer-Verlag, ], 2012
eBooks
Friedman, Thomas L.
Penguin Book, 2006
Buku Teks