Cita APA (7a ed.)

Walctad, W. B. (2002). Study Guide to accompany Economics ed.15. McGraw-Hill.

Cita Chicago Style (17a ed.)

Walctad, William B. Study Guide to Accompany Economics Ed.15. McGraw-Hill, 2002.

Cita MLA (8a ed.)

Walctad, William B. Study Guide to Accompany Economics Ed.15. McGraw-Hill, 2002.