APA (7th ed.) Citation

Keylor, W. R. (1992). The twentieth-century world: An international history (2. ed., 1. print.). Oxford Univ. Pr.

Chicago Style (17th ed.) Citation

Keylor, William R. The Twentieth-century World: An International History. 2. ed., 1. print. New York [u.a.]: Oxford Univ. Pr, 1992.

MLA (9th ed.) Citation

Keylor, William R. The Twentieth-century World: An International History. 2. ed., 1. print. Oxford Univ. Pr, 1992.