Gaya APA

Dorfman,Robert, ., S., D. (1977). Economic Of The Environment Selected Readings (2nd). New York: W.W.. VortonandCompany, Inc.

Gaya MLA

Dorfman,Robert, ., S., Dorfman,Nancy. "Economic Of The Environment Selected Readings". 2nd New York: W.W.. VortonandCompany, Inc, 1977. Text.