APA (7th ed.) Citation

Gordon, F., & Gordon, S. (1992). Statistics for the twenty first century. The Mathematical Association of America.

Chicago Style (17th ed.) Citation

Gordon, Florence, and Sheldon Gordon. Statistics for the Twenty First Century. Nueva York: The Mathematical Association of America, 1992.

MLA (9th ed.) Citation

Gordon, Florence, and Sheldon Gordon. Statistics for the Twenty First Century. The Mathematical Association of America, 1992.