APA (7e ed.) Bronvermelding

Perman, R. (2011). Natural resource and environmental economics (4th ed.). Pearson Education.

Chicago (17e ed.) Bronvermelding

Perman, Roger. Natural Resource and Environmental Economics. 4th ed. Harlow, Essex, Eng: Pearson Education, 2011.

MLA (9e ed.) Bronvermelding

Perman, Roger. Natural Resource and Environmental Economics. 4th ed. Pearson Education, 2011.

Let op: Deze citaties zijn niet altijd 100% accuraat.