Wakeman, R. M., & Willis, F. R. (1982). Instructor's guide to accompany world civilization. D.C. Heath and Company.
Chicago-čujuhus (17. p.)Wakeman, Rosemary M., juo F. Roy Willis. Instructor's Guide to Accompany World Civilization. Lexington Massachusetts: D.C. Heath and Company, 1982.
MLA-čujuhus (9. p.)Wakeman, Rosemary M., juo F. Roy Willis. Instructor's Guide to Accompany World Civilization. D.C. Heath and Company, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.