APA (7th ed.) Citation

Petroleum Economist Cartographic (Firm) & Petroleum Economist Ltd. (2001). World energy atlas. Petroleum Economist.

Chicago Style (17th ed.) Citation

Petroleum Economist Cartographic (Firm) and Petroleum Economist Ltd. World Energy Atlas. London: Petroleum Economist, 2001.

MLA (9th ed.) Citation

Petroleum Economist Cartographic (Firm) and Petroleum Economist Ltd. World Energy Atlas. Petroleum Economist, 2001.

Warning: These citations may not always be 100% accurate.