Spencer, D. E., & Parkin, M. (1990). Study guide: Parkin : Economics. Addison-Wesley.
Chicagoスタイル(17版)引用形式Spencer, David E., , Michael Parkin. Study Guide: Parkin : Economics. Reading, Mass: Addison-Wesley, 1990.
MLA(9版)引用形式Spencer, David E., , Michael Parkin. Study Guide: Parkin : Economics. Addison-Wesley, 1990.
警告: この引用は必ずしも正確ではありません.