APA-čujuhus (7. p.)
Spencer, M. H., & Amos, O. M. (1993). Contemporary economics (8th ed.). Worth Publishers.
Chicago-čujuhus (17. p.)
Spencer, Miltone H., juo Orley M. Amos. Contemporary Economics. 8th ed. New York: Worth Publishers, 1993.
MLA-čujuhus (9. p.)
Spencer, Miltone H., juo Orley M. Amos. Contemporary Economics. 8th ed. Worth Publishers, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.