APA (7e ed.) Bronvermelding
International Labour Office & ebrary, Inc. (2009). Safety and health in underground coalmines. International Labour Office.
Chicago (17e ed.) Bronvermelding
International Labour Office en Inc ebrary. Safety and Health in Underground Coalmines. Geneva: International Labour Office, 2009.
MLA (9e ed.) Bronvermelding
International Labour Office en Inc ebrary. Safety and Health in Underground Coalmines. International Labour Office, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.