International Labour Office. (1977). International directory of occupational safety and health services and institutions (3rd ed.). International Labour Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Labour Office. International Directory of Occupational Safety and Health Services and Institutions. 3rd ed. Geneva: International Labour Office, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Labour Office. International Directory of Occupational Safety and Health Services and Institutions. 3rd ed. International Labour Office, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.