Dyfyniad APA

Jarvis, P. J. (2000). Ecological principles and environmental issues. Pearson Education.

Dyfyniad Arddull Chicago

Jarvis, Peter J. Ecological Principles and Environmental Issues. Harlow, England: Pearson Education, 2000.

Dyfyniad MLA

Jarvis, Peter J. Ecological Principles and Environmental Issues. Pearson Education, 2000.

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