HART ROBERT A. (2004). ECONOMICS OF OVERTIME WORKING. CAMBRIDGE UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)HART ROBERT A. ECONOMICS OF OVERTIME WORKING. CAMBRIDGE: CAMBRIDGE UNIVERSITY PRESS, 2004.
Lua MLA (9ú heag.)HART ROBERT A. ECONOMICS OF OVERTIME WORKING. CAMBRIDGE UNIVERSITY PRESS, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.