APA (7th ed.) Citation

Sobel, M. A. (1991). Precalculus mathematics (4th.ed.). Prentice Hall.

Chicago Style (17th ed.) Citation

Sobel, Max A. Precalculus Mathematics. 4th.ed. Englewood Cliffs: Prentice Hall, 1991.

MLA (9th ed.) Citation

Sobel, Max A. Precalculus Mathematics. 4th.ed. Prentice Hall, 1991.

Warning: These citations may not always be 100% accurate.