APA (7e ed.) Bronvermelding

Christy, D. T. (1993). Essentials of precalculus algebra and trigonometry (5th ed.). Wm. C. Brown Publishers.

Chicago (17e ed.) Bronvermelding

Christy, Dennis T. Essentials of Precalculus Algebra and Trigonometry. 5th ed. Dubuque, Iowa: Wm. C. Brown Publishers, 1993.

MLA (9e ed.) Bronvermelding

Christy, Dennis T. Essentials of Precalculus Algebra and Trigonometry. 5th ed. Wm. C. Brown Publishers, 1993.