Cita APA

Beecher, J. A., & Penna, J. A. (2006). College algebra. New York: Pearson/Addison Wesley.

Chicago Style Citation

Beecher, Judith A., i Judith A. Penna. College Algebra. New York: Pearson/Addison Wesley, 2006.

Cita MLA

Beecher, Judith A., i Judith A. Penna. College Algebra. New York: Pearson/Addison Wesley, 2006.