Franklin

MLA

Frain, Hummel La Rue. An Examination of Earnings In Certain Standard Machine Tool Occupations In Philadelphia. Philadelphia, 1929.

APA

Frain, H. La Rue. (1929). An examination of earnings in certain standard machine tool occupations in Philadelphia. Philadelphia.

Chicago

Frain, Hummel La Rue. An Examination of Earnings In Certain Standard Machine Tool Occupations In Philadelphia,. Philadelphia, 1929.