Fraser, J. (1965). Industrial psychology. Pergamon press.
Lua i Stíl Chicago (17ú heag.)Fraser, J. Industrial Psychology. NULL: Pergamon press, 1965.
Lua MLA (9ú heag.)Fraser, J. Industrial Psychology. Pergamon press, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.