APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.