Mikdashi, Zuhayr
Cornell University Press, 1972
Buku Teks
Mikdashi, Zuhayr
George Allen & Unwin Ltd, 1972
Buku Teks
Noreng, Wystein
McGraw-Hill , 1980
Buku Teks
Maachou, Abdelkader, author
Berger-Levrault, 1982
Buku Teks
Harderer, Michael, author
OPEC Secretariat, 2011
Buku Referensi