APA (7th ed.) Citation

Cohen, D., Lee, T., & Sklar, D. (2006). Precalculus with unit-circle trigonometry (Fourth edition.). Thomson/Brooks/Cole.

Chicago Style (17th ed.) Citation

Cohen, David, Theodore Lee, and David Sklar. Precalculus with Unit-circle Trigonometry. Fourth edition. Belmont, CA: Thomson/Brooks/Cole, 2006.

MLA (8th ed.) Citation

Cohen, David, et al. Precalculus with Unit-circle Trigonometry. Fourth edition. Thomson/Brooks/Cole, 2006.