Não informado. (2011). Work Study & Management Services. Institute of Practitioners in Work Study, Organization and Methods.
Chicago-Zitierstil (17. Ausg.)Não informado. Work Study & Management Services. Middlesex, Inglaterra: Institute of Practitioners in Work Study, Organization and Methods, 2011.
MLA-Zitierstil (8. Ausg.)Não informado. Work Study & Management Services. Institute of Practitioners in Work Study, Organization and Methods, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.