APA (7th ed.) Citation

Cottrell, P. L. (1992). Events a chronicle of the twentieth century. Oxford University Press.

Chicago Style (17th ed.) Citation

Cottrell, P. L. Events a Chronicle of the Twentieth Century. New York: Oxford University Press, 1992.

MLA (9th ed.) Citation

Cottrell, P. L. Events a Chronicle of the Twentieth Century. Oxford University Press, 1992.