APA (7th ed.) Citation

Petroleum Economist Cartographic (Firm), Fuller, K., & Bush, P. (2015). World gas map (2015 edition.). Petroleum Economist.

Chicago Style (17th ed.) Citation

Petroleum Economist Cartographic (Firm), K. Fuller, and P. Bush. World Gas Map. 2015 edition. London: Petroleum Economist, 2015.

MLA (9th ed.) Citation

Petroleum Economist Cartographic (Firm), et al. World Gas Map. 2015 edition. Petroleum Economist, 2015.