Cita APA (7th ed.)

Howell, D. C. (2010). Statistical methods for psychology (7a. ed.). Wadsworth.

Cita Chicago (17th ed.)

Howell, David C. Statistical Methods for Psychology. 7a. ed. Belmont: Wadsworth, 2010.

Cita MLA (9th ed.)

Howell, David C. Statistical Methods for Psychology. 7a. ed. Wadsworth, 2010.