Walstad, W. B. (2009). Study guide for use with McConnell, Brue, and Flynn economics. Boston: McGraw-Hill.
シカゴスタイル引用形Walstad, William B. Study Guide for Use With McConnell, Brue, and Flynn Economics. Boston: McGraw-Hill, 2009.
MLA引用形式Walstad, William B. Study Guide for Use With McConnell, Brue, and Flynn Economics. Boston: McGraw-Hill, 2009.
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