Cita APA

Enger, E. D., & Smith, B. F. (2013). Environmental science: A study of interrelationships (13th edition.). McGraw Hill.

Chicago Style (17th ed.) Citation

Enger, Eldon D., i Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 13th edition. New York: McGraw Hill, 2013.

Cita MLA

Enger, Eldon D., i Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 13th edition. McGraw Hill, 2013.