Gregory, P. R. (2002). Essentials of economics (5th ed.). Addison Wesley.
Chicagoスタイル(17版)引用形式Gregory, Paul R. Essentials of Economics. 5th ed. Boston, Mass: Addison Wesley, 2002.
MLA(9版)引用形式Gregory, Paul R. Essentials of Economics. 5th ed. Addison Wesley, 2002.
警告: この引用は必ずしも正確ではありません.