APA استشهاد

Samuelson, P. A. R. (1961). Study guide and workbook to accompany Samuelson: Economics (5.).

استشهاد بنمط شيكاغو

Samuelson, Paul A; Robinson. Study Guide and Workbook to Accompany Samuelson: Economics. 5. McGraw-Hill book Co, Inc, NewYork, 1961.

MLA استشهاد

Samuelson, Paul A; Robinson. Study Guide and Workbook to Accompany Samuelson: Economics. 5. 1961.