FMO. (1991). Tractors. Illinois: John Deere.
Chicago Style aipamenaFMO. Tractors. Illinois: John Deere, 1991.
MLA aipamenaFMO. Tractors. Illinois: John Deere, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
APA aipamena