International Labour Office. (1977). International directory of occupational safety and health services and institutions (3rd ed.). International Labour Office.
芝加哥风格引文International Labour Office. International Directory of Occupational Safety and Health Services and Institutions. 3rd ed. Geneva: International Labour Office, 1977.
MLA引文International Labour Office. International Directory of Occupational Safety and Health Services and Institutions. 3rd ed. International Labour Office, 1977.
警告：这些引文格式不一定是100％准确.