Dyfyniad APA

Ayres, R. U., Button, K., & Nijkamp, P. (1999). Global aspects of the environment. Edward Elgar Pub. Ltd.

Dyfyniad Arddull Chicago

Ayres, Robert U., Kenneth Button, and Peter Nijkamp. Global Aspects of the Environment. Cheltenham, U.K: Edward Elgar Pub. Ltd, 1999.

Dyfyniad MLA

Ayres, Robert U., et al. Global Aspects of the Environment. Edward Elgar Pub. Ltd, 1999.

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