Não informado. (1967). Psychology of Learning and Motivation. Academic Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Psychology of Learning and Motivation. San Diego, Calif: Academic Press, 1967.
Lua MLA (8ú heag.)Não informado. Psychology of Learning and Motivation. Academic Press, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.