Turk. A History of Occupational Health and Safety. University of Nevada Press.
Chicago-viite (17. p.)Turk. A History of Occupational Health and Safety. University of Nevada Press.
MLA-viite (8. p.)Turk. A History of Occupational Health and Safety. University of Nevada Press.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.