Cita APA (7th ed.)

Keller, G., & Warrack, B. (1997). Statistics for management and economics (4a. ed.). International Thomson.

Cita Chicago (17th ed.)

Keller, Gerald, i Brian Warrack. Statistics for Management and Economics. 4a. ed. Belmont: International Thomson, 1997.

Cita MLA (9th ed.)

Keller, Gerald, i Brian Warrack. Statistics for Management and Economics. 4a. ed. International Thomson, 1997.