Não informado. (1953). Nebraska Symposium on Motivation. University of Nebraska, Department of Psychology.
Chicago-referens (17:e uppl.)Não informado. Nebraska Symposium on Motivation. Lincoln, Neb: University of Nebraska, Department of Psychology, 1953.
MLA-referens (8:e uppl.)Não informado. Nebraska Symposium on Motivation. University of Nebraska, Department of Psychology, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.