Cita APA (7a ed.)

Levinson, D., & Lawrimore, J. A. State of the climate in 2007.

Cita Chicago Style (17a ed.)

Levinson, D.H, y J.H. Arguez Lawrimore. State of the Climate in 2007. Department of Commerce of United States of America.

Cita MLA (9a ed.)

Levinson, D.H, y J.H. Arguez Lawrimore. State of the Climate in 2007.