Higgins, G. (1959). Labor-management cooperation. Diocesan Labor Institute.
Lua i Stíl Chicago (17ú heag.)Higgins, George. Labor-management Cooperation. New Haven, Conn.: Diocesan Labor Institute, 1959.
Lua MLA (8ú heag.)Higgins, George. Labor-management Cooperation. Diocesan Labor Institute, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.