International Labour Office. (1970). Introduction to social security: A workers educational manual. International Labour Office.
শিকাগো স্টাইলে সাইটেশনInternational Labour Office. Introduction to Social Security: A Workers Educational Manual. Geneva: International Labour Office, 1970.
এমএলএ সাইটেশনInternational Labour Office. Introduction to Social Security: A Workers Educational Manual. International Labour Office, 1970.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.