Cita APA (7th ed.)

Enger, E. D. (2000). Environmental Science: A Study of Interrelationships. MC Graw Hill.

Cita Chicago (17th ed.)

Enger, Eldon D. Environmental Science: A Study of Interrelationships. New York: MC Graw Hill, 2000.

Cita MLA (9th ed.)

Enger, Eldon D. Environmental Science: A Study of Interrelationships. MC Graw Hill, 2000.