APA (7th ed.) Citation

Spence, J., & Spence, J. E. (1992). Nations: A survey of the twentieth century. Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Spence, Jack, and J. E. Spence. Nations: A Survey of the Twentieth Century. Oxford: Oxford Univ. Press, 1992.

MLA (9th ed.) Citation

Spence, Jack, and J. E. Spence. Nations: A Survey of the Twentieth Century. Oxford Univ. Press, 1992.