APA استشهاد

Hanley, N. (1997). Environmental economics in theory and practice. Macmillan.

استشهاد بنمط شيكاغو

Hanley, Nick. Environmental Economics in Theory and Practice. London: Macmillan, 1997.

MLA استشهاد

Hanley, Nick. Environmental Economics in Theory and Practice. Macmillan, 1997.