APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

Keller, Gerald, Henry Bartel, en Brian Warrack. Statistics for Management and Economics: A Systematic Approach. Belmont, Calif: Wadsworth Pub. Co, 1988.

MLA (9e ed.) Bronvermelding

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