Daugherty, C. R. (1933). Labor problems in American industry. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Daugherty, Carroll R. Labor Problems in American Industry. Boston, New York [etc.]: Houghton Mifflin, 1933.
Lua MLA (8ú heag.)Daugherty, Carroll R. Labor Problems in American Industry. Houghton Mifflin, 1933.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.