APA (7e ed.) Bronvermelding

Sobel, M. A., & Lerner, N. (1983). Algebra and trigonometry: A pre-calculus approach (2nd ed.). Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Sobel, Max A., en Norbert Lerner. Algebra and Trigonometry: A Pre-calculus Approach. 2nd ed. Englewood Cliffs, N. J: Prentice-Hall, 1983.

MLA (9e ed.) Bronvermelding

Sobel, Max A., en Norbert Lerner. Algebra and Trigonometry: A Pre-calculus Approach. 2nd ed. Prentice-Hall, 1983.