Barth, P. S. 1. (1987). The tragedy of black lung: Federal compensation for occupational disease. W.E. Upjohn Institute for Employment Research.
Chicago-referens (17:e uppl.)Barth, Peter S. 1937. The Tragedy of Black Lung: Federal Compensation for Occupational Disease. Kalamazoo, MI: W.E. Upjohn Institute for Employment Research, 1987.
MLA-referens (9:e uppl.)Barth, Peter S. 1937. The Tragedy of Black Lung: Federal Compensation for Occupational Disease. W.E. Upjohn Institute for Employment Research, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.