APA aipamena

SPIELVOGEL, J. J. (2006). World history journey across time. McGraw-Hill.

Chicago Style aipamena

SPIELVOGEL, Jackson J. World History Journey Across Time. McGraw-Hill, 2006.

MLA aipamena

SPIELVOGEL, Jackson J. World History Journey Across Time. McGraw-Hill, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.