Cita APA (7th ed.)
Enger, E. D., Smith, B. F., & Bockarie, A. T. (2006). Environmental science: A study of interrelationships (10th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Enger, Eldon D., Bradley F. Smith, i Anne Todd Bockarie. Environmental Science: A Study of Interrelationships. 10th ed. Boston: McGraw-Hill, 2006.
Cita MLA (9th ed.)
Enger, Eldon D., et al. Environmental Science: A Study of Interrelationships. 10th ed. McGraw-Hill, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.