APA (7th ed.) Citation

Petroleum Economist Ltd., Chevron Corporation, & Petroleum Economist Ltd. (2018). World gas map (2019 edition.). The Petroleum Economist Ltd.

Chicago Style (17th ed.) Citation

Petroleum Economist Ltd., Chevron Corporation, and Petroleum Economist Ltd. World Gas Map. 2019 edition. London: The Petroleum Economist Ltd, 2018.

MLA (8th ed.) Citation

Petroleum Economist Ltd., et al. World Gas Map. 2019 edition. The Petroleum Economist Ltd, 2018.