APA (7th ed.) Citation

Petroleum Economist Cartographic (Firm), Fuller, K., & Bush, P. (2014). World gas map (2014 edition.). Petroleum Economist Ltd..

Chicago Style (17th ed.) Citation

Petroleum Economist Cartographic (Firm), K. Fuller, and P. Bush. World Gas Map. 2014 edition. London: Petroleum Economist Ltd., 2014.

MLA (9th ed.) Citation

Petroleum Economist Cartographic (Firm), et al. World Gas Map. 2014 edition. Petroleum Economist Ltd., 2014.