SPIELVOGEL, J. J. (2006). World history journey across time. McGraw-Hill.
Chicago-čujuhus (17. p.)SPIELVOGEL, Jackson J. World History Journey Across Time. McGraw-Hill, 2006.
MLA-čujuhus (9. p.)SPIELVOGEL, Jackson J. World History Journey Across Time. McGraw-Hill, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.