Dyfyniad APA

Turk, A., & Wittes, J. T. (1972). Ecology pollution evironment. Saunders Company.

Dyfyniad Arddull Chicago

Turk, Amos, and Janet T. Wittes. Ecology Pollution Evironment. Saunders Company, 1972.

Dyfyniad MLA

Turk, Amos, and Janet T. Wittes. Ecology Pollution Evironment. Saunders Company, 1972.

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