Copland, J. W. (1985). Draught animal power for production. Australian Centre for International Agricultural Research.
Lua i Stíl Chicago (17ú heag.)Copland, J. W. Draught Animal Power for Production. Canberra, A.C.T: Australian Centre for International Agricultural Research, 1985.
Lua MLA (9ú heag.)Copland, J. W. Draught Animal Power for Production. Australian Centre for International Agricultural Research, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.