Παραπομπή APA

Enger, E. D. (1997). Environmental science: A study of interrelationships. Boston, Massachusetts: WCB/McGraw-Hill.

Παραπομπή Chicago Style

Enger, Eldon D. Environmental Science: A Study of Interrelationships. Boston, Massachusetts: WCB/McGraw-Hill, 1997.

Παραπομπή MLA

Enger, Eldon D. Environmental Science: A Study of Interrelationships. Boston, Massachusetts: WCB/McGraw-Hill, 1997.

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