Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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