APA (7th ed.) Citation

Petroleum Economist Ltd & Ernst & Young. (1996). World gas map (3rd ed.). Petroleum Economist.

Chicago Style (17th ed.) Citation

Petroleum Economist Ltd and Ernst & Young. World Gas Map. 3rd ed. London: Petroleum Economist, 1996.

MLA (9th ed.) Citation

Petroleum Economist Ltd and Ernst & Young. World Gas Map. 3rd ed. Petroleum Economist, 1996.

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