Cita APA

C.Field Barry, & K.Field Martha. (2005). Environmental Economics. American: MC Graw Hill.

Chicago Style Citation

C.Field Barry, i K.Field Martha. Environmental Economics. American: MC Graw Hill, 2005.

Cita MLA

C.Field Barry, i K.Field Martha. Environmental Economics. American: MC Graw Hill, 2005.

Atenció: Aquestes cites poden no estar 100% correctes.