Watkins, G. S., & Dodd, P. A. (1940). Labor problems (3d ed.). Thomas Y. Crowell Co..
Lua i Stíl Chicago (17ú heag.)Watkins, Gordon S., agus Paul A. Dodd. Labor Problems. 3d ed. New York: Thomas Y. Crowell Co., 1940.
Lua MLA (8ú heag.)Watkins, Gordon S., agus Paul A. Dodd. Labor Problems. 3d ed. Thomas Y. Crowell Co., 1940.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.