Haberlandt, K. Cognitive psychology. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Haberlandt, Karl. Cognitive Psychology. Allyn and Bacon.
Lua MLA (8ú heag.)Haberlandt, Karl. Cognitive Psychology. Allyn and Bacon.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.