APA (7th ed.) Citation

Hopkins, W. S. (1948). Labor in the American economy. McGraw-Hill Book Co.

Chicago Style (17th ed.) Citation

Hopkins, William Stephen. Labor in the American Economy. New York: McGraw-Hill Book Co, 1948.

MLA (9th ed.) Citation

Hopkins, William Stephen. Labor in the American Economy. McGraw-Hill Book Co, 1948.