Duiker, W. J., & Spielvogel, J. J. (2010). World history (6th ed.). Wadsworth Cengage Learning.
Chicago-čujuhus (17. p.)Duiker, William J., juo Jackson J. Spielvogel. World History. 6th ed. Boston, MA: Wadsworth Cengage Learning, 2010.
MLA-čujuhus (9. p.)Duiker, William J., juo Jackson J. Spielvogel. World History. 6th ed. Wadsworth Cengage Learning, 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.