Gravetter, F. J., & Forzano, L. B. (2021). Research methods for the behavioral sciences (6th edition.). Cengage.
Cita Chicago (17th ed.)Gravetter, Frederick J., i Lori-Ann B. Forzano. Research Methods for the Behavioral Sciences. 6th edition. United Kindom, Andover, Hampshire: Cengage, 2021.
Cita MLA (9th ed.)Gravetter, Frederick J., i Lori-Ann B. Forzano. Research Methods for the Behavioral Sciences. 6th edition. Cengage, 2021.
Atenció: Aquestes cites poden no estar 100% correctes.