APA استشهاد

International Labour Office , G. (1978). Introduction to work Study (3rd Rev Ed.). ILO.

استشهاد بنمط شيكاغو

International Labour Office , Geneva. Introduction to Work Study. 3rd Rev Ed. Geneva, ILO: ILO, 1978.

MLA استشهاد

International Labour Office , Geneva. Introduction to Work Study. 3rd Rev Ed. ILO, 1978.