APA-viite (7. p.)

Freund, J. E., & Williams, F. J. (1982). Elementary business statistics: The modern approach (4th ed.). Prentice-Hall International.

Chicago-viite (17. p.)

Freund, John E., ja Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. London: Prentice-Hall International, 1982.

MLA-viite (9. p.)

Freund, John E., ja Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Prentice-Hall International, 1982.