APA (7e ed.) Bronvermelding
Enger, E. D., & Smith, B. F. (2004). Environmental science: A study of interrelationships (9th ed.). McGraw-Hill Higher Education.
Chicago (17e ed.) Bronvermelding
Enger, Eldon D., en Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. Boston: McGraw-Hill Higher Education, 2004.
MLA (9e ed.) Bronvermelding
Enger, Eldon D., en Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. McGraw-Hill Higher Education, 2004.
Let op: Deze citaties zijn niet altijd 100% accuraat.