APA (7th ed.) Citation

Keller, G., Bartel, H., & Warrack, B. (1990). Statistics for management and economics: A system approach (2nd ed.). Wadsworth.

Chicago Style (17th ed.) Citation

Keller, Gerald, Henry Bartel, and Brian Warrack. Statistics for Management and Economics: A System Approach. 2nd ed. Belmont, Calif: Wadsworth, 1990.

MLA (9th ed.) Citation

Keller, Gerald, et al. Statistics for Management and Economics: A System Approach. 2nd ed. Wadsworth, 1990.