Cita APA (7a ed.)
Enger, E. D., & Smith, B. F. (2004). Environmental science: A study of interrelationships (9th ed.). McGraw-Hill Higher Education.
Cita Chicago Style (17a ed.)
Enger, Eldon D., y Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. Boston: McGraw-Hill Higher Education, 2004.
Cita MLA (9a ed.)
Enger, Eldon D., y Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. McGraw-Hill Higher Education, 2004.
Precaución: Estas citas no son 100% exactas.