Cita APA (7a ed.)

Keedy, M. L., & Bittinger, M. L. (1972). Essential mathematics: A modern approach. Addison-Wesley.

Cita Chicago Style (17a ed.)

Keedy, Mervin L., y Marvin L. Bittinger. Essential Mathematics: A Modern Approach. Reading, Massachusetts: Addison-Wesley, 1972.

Cita MLA (8a ed.)

Keedy, Mervin L., y Marvin L. Bittinger. Essential Mathematics: A Modern Approach. Addison-Wesley, 1972.