APA (7th ed.) Citation

(2008). World gas map (2008 ed.). Petroleum Economist.

Chicago Style (17th ed.) Citation

World Gas Map. 2008 ed. London: Petroleum Economist, 2008.

MLA (9th ed.) Citation

World Gas Map. 2008 ed. Petroleum Economist, 2008.

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