Walstad, W. B. (2010). Study guide for use with Brue, McConnell, and Fynn Essentials of economics. New York: McGraw-Hill.
استشهاد بنمط شيكاغوWalstad, William B. Study Guide for Use With Brue, McConnell, and Fynn Essentials of Economics. New York: McGraw-Hill, 2010.
MLA استشهادWalstad, William B. Study Guide for Use With Brue, McConnell, and Fynn Essentials of Economics. New York: McGraw-Hill, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.