Não informado. (1976). Contemporary Educational Psychology. Academic Press.
Chicago-referens (17:e uppl.)Não informado. Contemporary Educational Psychology. San Diego, Calif: Academic Press, 1976.
MLA-referens (8:e uppl.)Não informado. Contemporary Educational Psychology. Academic Press, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.