APA (7th ed.) Citation

Kuuskraa Vello, Stevens Scott, Leeuwen Tyler Van, Moodhe Keith, & U.S. Energy Information Administration. World shale gas resources , an initial assessment of 14 regions outside the United States.

Chicago Style (17th ed.) Citation

Kuuskraa Vello, Stevens Scott, Leeuwen Tyler Van, Moodhe Keith, and U.S. Energy Information Administration. World Shale Gas Resources , an Initial Assessment of 14 Regions Outside the United States.

MLA (9th ed.) Citation

Kuuskraa Vello, et al. World Shale Gas Resources , an Initial Assessment of 14 Regions Outside the United States.