Cita APA (7th ed.)

Keller, G., & Warrack, B. (1994). Essentials of business statistics (2nd ed.). Duxbury Press.

Cita Chicago (17th ed.)

Keller, Gerald, i Brian Warrack. Essentials of Business Statistics. 2nd ed. Belmont, California: Duxbury Press, 1994.

Cita MLA (9th ed.)

Keller, Gerald, i Brian Warrack. Essentials of Business Statistics. 2nd ed. Duxbury Press, 1994.