Cita APA

 Enger Eldon D. (2010).  Environmental science: A study of interrelationships.  McGraw-Hill.

Chicago Style Citation

 Enger Eldon D.  Environmental Science: A Study of Interrelationships.  McGraw-Hill, 2010.

Cita MLA

 Enger Eldon D.  Environmental Science: A Study of Interrelationships.  McGraw-Hill, 2010.

Atenció: Aquestes cites poden no estar 100% correctes.