Não informado. (1953). Nebraska Symposium on Motivation. University of Nebraska, Department of Psychology.
Lua i Stíl Chicago (17ú heag.)Não informado. Nebraska Symposium on Motivation. Lincoln, Neb: University of Nebraska, Department of Psychology, 1953.
Lua MLA (8ú heag.)Não informado. Nebraska Symposium on Motivation. University of Nebraska, Department of Psychology, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.