APA-Zitierstil (7. Ausg.)

(2005). National oil companies of the world map (1. ed.). Petroleum Economist.

Chicago-Zitierstil (17. Ausg.)

National Oil Companies of the World Map. 1. ed. London: Petroleum Economist, 2005.

MLA-Zitierstil (9. Ausg.)

National Oil Companies of the World Map. 1. ed. Petroleum Economist, 2005.