APA-referens (7:e uppl.)
Graebner, W. (1976). Coal-mining safety in the progressive period: The political economy of reform. The University Press of Kentucky.
Chicago-referens (17:e uppl.)
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. Lexington, Kentucky: The University Press of Kentucky, 1976.
MLA-referens (9:e uppl.)
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. The University Press of Kentucky, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.