Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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