Cozby, P. C. (2004). Methods in behavioral research (8th ed.). McGraw- Hill.
Cita Chicago (17th ed.)Cozby, Paul C. Methods in Behavioral Research. 8th ed. New York: McGraw- Hill, 2004.
Cita MLA (9th ed.)Cozby, Paul C. Methods in Behavioral Research. 8th ed. McGraw- Hill, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.