APA (7th ed.) Citation

(2013). North America unconventional oil map (2013 ed.). Petroleum Economist u.a.

Chicago Style (17th ed.) Citation

North America Unconventional Oil Map. 2013 ed. London: Petroleum Economist u.a, 2013.

MLA (9th ed.) Citation

North America Unconventional Oil Map. 2013 ed. Petroleum Economist u.a, 2013.

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