Não informado. (2004). Farm machinery and equipment. National Retail Farm Equipment Association.
Citação do estilo Chicago (17ª ed.)Não informado. Farm Machinery and Equipment. Washington: National Retail Farm Equipment Association, 2004.
Citação MLA (8ª ed.)Não informado. Farm Machinery and Equipment. National Retail Farm Equipment Association, 2004.
警告：这些引文格式不一定是100％准确.