Não informado. (2004). Farm machinery and equipment. National Retail Farm Equipment Association.
Chicago-referens (17:e uppl.)Não informado. Farm Machinery and Equipment. Washington: National Retail Farm Equipment Association, 2004.
MLA-referens (8:e uppl.)Não informado. Farm Machinery and Equipment. National Retail Farm Equipment Association, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.