Berck, P., & Helfand, G. E. (2011). The Economics of the environment (International edition.). Pearson Addison-Wesley.
Chicagoスタイル(17版)引用形式Berck, Peter, , Gloria E. Helfand. The Economics of the Environment. International edition. Boston: Pearson Addison-Wesley, 2011.
MLA(9版)引用形式Berck, Peter, , Gloria E. Helfand. The Economics of the Environment. International edition. Pearson Addison-Wesley, 2011.
警告: この引用は必ずしも正確ではありません.