Harshbarger, R. J., & Reynolds, J. J. (1989). Applied calculus: For management, life, and social sciences (3rd ed.). D.C. Heath.

Harshbarger, Ronald J., and James J. Reynolds. Applied Calculus: For Management, Life, and Social Sciences. 3rd ed. Lexington, Mass: D.C. Heath, 1989.

Harshbarger, Ronald J., and James J. Reynolds. Applied Calculus: For Management, Life, and Social Sciences. 3rd ed. D.C. Heath, 1989.