Cita APA (7th ed.)

Keller, G., Warrack, B., & Bartel, H. (1988). Statistics for management and economics: A systematic approach. Wadsworth Publishing Company.

Cita Chicago (17th ed.)

Keller, Gerald, Brian Warrack, i Henry Bartel. Statistics for Management and Economics: A Systematic Approach. Belmont, California: Wadsworth Publishing Company, 1988.

Cita MLA (9th ed.)

Keller, Gerald, et al. Statistics for Management and Economics: A Systematic Approach. Wadsworth Publishing Company, 1988.