El-Dahdah, Antoine
Librairie Du Liban Publishers, 1993
Buku Referensi
Klaiman, M.H.
Cambridge University Press , 1991
Buku Teks
Sayer, Mandy
Allen & Unwin, 1990
Buku Teks
Harvard Business Press, 2008
Buku Teks
Ondaatje, Michael
General Publishing , 1976
Buku Teks