APA-referens (7:e uppl.)

Keller, G., Bartel, H., & Warrack, B. (1994). Statistics for management and Economics (3rd. ed.). Duxbury.

Chicago-referens (17:e uppl.)

Keller, Gerald, Henry Bartel, och Brian Warrack. Statistics for Management and Economics. 3rd. ed. Belmont: Duxbury, 1994.

MLA-referens (9:e uppl.)

Keller, Gerald, et al. Statistics for Management and Economics. 3rd. ed. Duxbury, 1994.