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