APA-referens (7:e uppl.)

Watson, C. J., & Billingsley, P. j. a. (1990). Statistics for Management and Economics (4th.). Allyn and Bacon.

Chicago-referens (17:e uppl.)

Watson, Collin J., och Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Boston: Allyn and Bacon, 1990.

MLA-referens (9:e uppl.)

Watson, Collin J., och Patrick joined author Billingsley. Statistics for Management and Economics. 4th. Allyn and Bacon, 1990.