Cita APA (7th ed.)

Hays, W. L. (1981). Statistics (3a. ed.). Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Hays, William L. Statistics. 3a. ed. Nueva York: Holt, Rinehart and Winston, 1981.

Cita MLA (9th ed.)

Hays, William L. Statistics. 3a. ed. Holt, Rinehart and Winston, 1981.