Shaughnessy, J. J. (1985). Research methods in psychology. Alfred A. Knopf.
Lua i Stíl Chicago (17ú heag.)Shaughnessy, John J. Research Methods in Psychology. Alfred A. Knopf, 1985.
Lua MLA (9ú heag.)Shaughnessy, John J. Research Methods in Psychology. Alfred A. Knopf, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.