Bibliografi Jentarik

Ertel, Patrick W. (2001), The American Tractor: A Century of Legendary Machines, Osceola, WI, USA: MBI, ISBN 978-0760308639.CS1 maint: ref=harv (link)
Klancher, Lee; Leffingwell, Randy; Morland, Andrew; Pripps, Robert N. (2003), Farm Tractors, Crestline [Imprint of MBI], ISBN 978-0760317761.CS1 maint: ref=harv (link)
Leffingwell, Randy (2004), Ford Farm Tractors, Motorbooks Classics Series, Osceola, WI, USA: MBI, ISBN 978-0760319192.CS1 maint: ref=harv (link)
Miller, Orrin E. (2003), "John Froelich: The Story of a Man and a Tractor", dalam Macmillian, Don (penyunting), The John Deere Tractor Legacy, Voyaguer Press, ISBN 978-0896586192.CS1 maint: ref=harv (link)
Pripps, Robert N.; Morland, Andrew (photographer) (1993), Farmall Tractors: History of International McCormick-Deering Farmall Tractors, Farm Tractor Color History Series, Osceola, WI, USA: MBI, ISBN 978-0-87938-763-1.CS1 maint: ref=harv (link)
Rumeley, Edward A. (1910), "The Passing Of The Man With The Hoe", The World's Work: A History of Our Time, XX: 13246–13258, dicapai pada 2009-07-10 Unknown parameter |month= ignored (bantuan)

Berkaitan

Rujukan