U. S. Bureau of labor statistics & Stewart, E. M. (1926). Handbook of American trade-unions. October, 1926. Govt. print. off.
Lua i Stíl Chicago (17ú heag.)U. S. Bureau of labor statistics agus Estelle May Stewart. Handbook of American Trade-unions. October, 1926. Washington: Govt. print. off, 1926.
Lua MLA (9ú heag.)U. S. Bureau of labor statistics agus Estelle May Stewart. Handbook of American Trade-unions. October, 1926. Govt. print. off, 1926.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.