APA (7e ed.) Bronvermelding
Graebner, W. (1976). Coal-mining safety in the progressive period: The political economy of reform. The University Press of Kentucky.
Chicago (17e ed.) Bronvermelding
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. Lexington, Kentucky: The University Press of Kentucky, 1976.
MLA (9e ed.) Bronvermelding
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. The University Press of Kentucky, 1976.
Let op: Deze citaties zijn niet altijd 100% accuraat.