APA aipamena

Grygiel, J. J. (2006). Great powers and geopolitical change. Johns Hopkins University Press.

Chicago Style aipamena

Grygiel, Jakub J. Great Powers and Geopolitical Change. Baltimore: Johns Hopkins University Press, 2006.

MLA aipamena

Grygiel, Jakub J. Great Powers and Geopolitical Change. Johns Hopkins University Press, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.