APA Style

Keylor, W, R, 1. (2011). The twentieth-century world and beyond : an international history since 1900 / William R. Keylor / William R. Keylor (6). Oxford: Oxford University Press.

MLA Style

Keylor, William, R.,, 1944-. "The twentieth-century world and beyond : an international history since 1900 / William R. Keylor / William R. Keylor". 6 Oxford: Oxford University Press, 2011. หนังสือ (Book).