Wakeman, R. M., & Willis, F. R. (1982). Instructor's guide to accompany world civilization. D.C. Heath and Company.
Chicago Style (17th ed.) ZitazioaWakeman, Rosemary M., eta F. Roy Willis. Instructor's Guide to Accompany World Civilization. Lexington Massachusetts: D.C. Heath and Company, 1982.
MLA (9th ed.) ZitazioaWakeman, Rosemary M., eta F. Roy Willis. Instructor's Guide to Accompany World Civilization. D.C. Heath and Company, 1982.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.