APA citiranje

Enger, E. D., & Smith, B. F. (2004). Environmental science: A study of interrelationships (9th ed.). Boston: McGraw-Hill Higher Education.

Trích dẫn kiểu Chicago

Enger, Eldon D., và Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. Boston: McGraw-Hill Higher Education, 2004.

MLA citiranje

Enger, Eldon D., và Bradley Fraser Smith. Environmental Science: A Study of Interrelationships. 9th ed. Boston: McGraw-Hill Higher Education, 2004.