APA

Beecher J. A., Penna J. A. & Bittinger M. L. (2012). Precalculus. Boston: Pearson Addison Wesley.

Chicago

Beecher Judith A, Penna Judith A and Bittinger Marvin L. 2012. Precalculus. Boston: Pearson Addison Wesley.

Harvard

Beecher J. A., Penna J. A. and Bittinger M. L. (2012). Precalculus. Boston: Pearson Addison Wesley.

MLA

Beecher Judith A, Penna Judith A and Bittinger Marvin L. Precalculus. Boston: Pearson Addison Wesley. 2012.