APA-referens (7:e uppl.)

Freund, J. E., Williams, F. J., & Perles, B. M. (1988). Elementary business statistics: The modern approach (5th ed.). Prentice-Hall.

Chicago-referens (17:e uppl.)

Freund, John E., Frank J. Williams, och Benjamin M. Perles. Elementary Business Statistics: The Modern Approach. 5th ed. London: Prentice-Hall, 1988.

MLA-referens (9:e uppl.)

Freund, John E., et al. Elementary Business Statistics: The Modern Approach. 5th ed. Prentice-Hall, 1988.