Shaughnessy, J. J. (1985). Research methods in psychology. Alfred A. Knopf.
Cita Chicago (17th ed.)Shaughnessy, John J. Research Methods in Psychology. Alfred A. Knopf, 1985.
Cita MLA (9th ed.)Shaughnessy, John J. Research Methods in Psychology. Alfred A. Knopf, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.