Cita APA

Enger, E. D., & Smith, B. F. (1998). Environmental Science: A Study of Interrelationships. Boston: McGraw-Hill.

Chicago Style Citation

Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Boston: McGraw-Hill, 1998.

Cita MLA

Enger, Eldon D., i Bradley F. Smith. Environmental Science: A Study of Interrelationships. Boston: McGraw-Hill, 1998.

Atenció: Aquestes cites poden no estar 100% correctes.