Kahn, J. R. (2005). The economic approach to environmental and natural resources. Victoria, Australia: Thomson (South-Western).
Trích dẫn kiểu ChicagoKahn, James R. The Economic Approach to Environmental and Natural Resources. Victoria, Australia: Thomson (South-Western), 2005.
Trích dẫn MLAKahn, James R. The Economic Approach to Environmental and Natural Resources. Victoria, Australia: Thomson (South-Western), 2005.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.