Harlow, H. F. (1971). Psychology. Albion Pub. Co.
Lua i Stíl Chicago (17ú heag.)Harlow, Harry F. Psychology. San Francisco: Albion Pub. Co, 1971.
Lua MLA (9ú heag.)Harlow, Harry F. Psychology. Albion Pub. Co, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.