APA citiranje

Purdom, P. W. (1983). Environmental science: Managing the environmental. Columbus: Merrill.

Trích dẫn kiểu Chicago

Purdom, P. Walton. Environmental Science: Managing the Environmental. Columbus: Merrill, 1983.

MLA citiranje

Purdom, P. Walton. Environmental Science: Managing the Environmental. Columbus: Merrill, 1983.

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