Cita APA (7th ed.)

Howell, D. C. (2013). Statistical methods for Psychology (8a. ed.). Wadsworth.

Cita Chicago (17th ed.)

Howell, David C. Statistical Methods for Psychology. 8a. ed. Belmont: Wadsworth, 2013.

Cita MLA (9th ed.)

Howell, David C. Statistical Methods for Psychology. 8a. ed. Wadsworth, 2013.