Não informado. (1967). Psychology of Learning and Motivation. Academic Press.
Chicago-referens (17:e uppl.)Não informado. Psychology of Learning and Motivation. San Diego, Calif: Academic Press, 1967.
MLA-referens (8:e uppl.)Não informado. Psychology of Learning and Motivation. Academic Press, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.