Field, B. C. (1997). Environmental Economics: An Introduction. Singapore: McGraw-Hill.
Trích dẫn kiểu ChicagoField, Barry C. Environmental Economics: An Introduction. Singapore: McGraw-Hill, 1997.
MLA引文Field, Barry C. Environmental Economics: An Introduction. Singapore: McGraw-Hill, 1997.
警告:這些引文格式不一定是100%准確.