Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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