Keppel, G., & Wickens, T. D. (2004). Design and analysis: A researcher's handbook (4th ed.). Pearson.
Cita Chicago (17th ed.)Keppel, Geoffrey, i Thomas D. Wickens. Design and Analysis: A Researcher's Handbook. 4th ed. New Jersey: Pearson, 2004.
Cita MLA (9th ed.)Keppel, Geoffrey, i Thomas D. Wickens. Design and Analysis: A Researcher's Handbook. 4th ed. Pearson, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.