APA (7th ed.) Citation

Ruud, W. L., & Shell, T. L. (1993). Prelude to calculus (2nd ed.). PWS-Kent.

Chicago Style (17th ed.) Citation

Ruud, Warren L., and Terry L. Shell. Prelude to Calculus. 2nd ed. Boston: PWS-Kent, 1993.

MLA (9th ed.) Citation

Ruud, Warren L., and Terry L. Shell. Prelude to Calculus. 2nd ed. PWS-Kent, 1993.