Copland, J. W. (1985). Draught animal power for production. Australian Centre for International Agricultural Research.
Chicago-referens (17:e uppl.)Copland, J. W. Draught Animal Power for Production. Canberra, A.C.T: Australian Centre for International Agricultural Research, 1985.
MLA-referens (9:e uppl.)Copland, J. W. Draught Animal Power for Production. Australian Centre for International Agricultural Research, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.