APA استشهاد

International Labour Office. (1969). Introduction to work study/2e (2nd ed.). International Labour Office.

استشهاد بنمط شيكاغو

International Labour Office. Introduction to Work Study/2e. 2nd ed. Geneva: International Labour Office, 1969.

MLA استشهاد

International Labour Office. Introduction to Work Study/2e. 2nd ed. International Labour Office, 1969.