APA-referens (7:e uppl.)

Hays, W. L. (1963). Statistics. Holt, Rinehart and Winston.

Chicago-referens (17:e uppl.)

Hays, William Lee. Statistics. New York: Holt, Rinehart and Winston, 1963.

MLA-referens (9:e uppl.)

Hays, William Lee. Statistics. Holt, Rinehart and Winston, 1963.