Dunlop, J. T. (1978). Labor in the twentieth century. ELSEVIER.
Lua i Stíl Chicago (17ú heag.)Dunlop, John T. Labor in the Twentieth Century. ELSEVIER, 1978.
Lua MLA (8ú heag.)Dunlop, John T. Labor in the Twentieth Century. ELSEVIER, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.