Goldstein, L. J., & Lay, D. I. (1993). Brief calculus and its applications (6th ed.). Prentice hall.

Goldstein, Larry J., and David I. Lay. Brief Calculus and Its Applications. 6th ed. New Jersey: Prentice hall, 1993.

Goldstein, Larry J., and David I. Lay. Brief Calculus and Its Applications. 6th ed. Prentice hall, 1993.