Não informado. (2011). Work Study & Management Services. Institute of Practitioners in Work Study, Organization and Methods.
Citação do estilo Chicago (17ª ed.)Não informado. Work Study & Management Services. Middlesex, Inglaterra: Institute of Practitioners in Work Study, Organization and Methods, 2011.
Citação MLA (8ª ed.)Não informado. Work Study & Management Services. Institute of Practitioners in Work Study, Organization and Methods, 2011.
警告：這些引文格式不一定是100％准確.