International Labour Office. (1970). Introduction to social security: A workers educational manual. International Labour Office.
استشهاد بنمط شيكاغوInternational Labour Office. Introduction to Social Security: A Workers Educational Manual. Geneva: International Labour Office, 1970.
MLA استشهادInternational Labour Office. Introduction to Social Security: A Workers Educational Manual. International Labour Office, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.