Bingham, R. C., & Walstad, W. B. (1990). A study guide to accompany McConnell and Brue economics (11th ed.). McGraw- Hill.
Chicago-čujuhus (17. p.)Bingham, Robert C., juo William B. Walstad. A Study Guide to Accompany McConnell and Brue Economics. 11th ed. New York: McGraw- Hill, 1990.
MLA-čujuhus (9. p.)Bingham, Robert C., juo William B. Walstad. A Study Guide to Accompany McConnell and Brue Economics. 11th ed. McGraw- Hill, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.