Catalogue Persistent Identifier
https://nla.gov.au/nla.cat-vn107740
APA Citation
(1979). Farm tractors. University Park, Pa : Pennsylvania State University, College of Agriculture Extension Service
MLA Citation
Farm tractors Pennsylvania State University, College of Agriculture Extension Service University Park, Pa 1979
Australian/Harvard Citation
1979, Farm tractors Pennsylvania State University, College of Agriculture Extension Service University Park, Pa
Wikipedia Citation
{{Citation | title=Farm tractors | year=1979 | publisher=Pennsylvania State University, College of Agriculture Extension Service | language=English }}