APA (7th ed.) Citation

Findling, J. E., & Thackeray, F. W. (1995). Events that changed the world in the twentieth century. Greenwood Press.

Chicago Style (17th ed.) Citation

Findling, John E., and Frank W. Thackeray. Events That Changed the World in the Twentieth Century. Westport, Conn: Greenwood Press, 1995.

MLA (9th ed.) Citation

Findling, John E., and Frank W. Thackeray. Events That Changed the World in the Twentieth Century. Greenwood Press, 1995.