APA
International Labour Office, International Labour Office, . (1972). Safety and health in building and civil engineering work. Geneva: International Labour Office.
Chicago
International Labour Office, International Labour Office, . 1972. Safety and health in building and civil engineering work. Geneva: International Labour Office.
Harvard
International Labour Office, International Labour Office, . (1972). Safety and health in building and civil engineering work. Geneva: International Labour Office.
MLA
International Labour Office, International Labour Office, . Safety and health in building and civil engineering work. Geneva: International Labour Office. 1972.