Agrawal, R. L. (1984). Identification of crop varieties. Oxford & IBH publishing company.
Chicago Style aipamenaAgrawal, R L. Identification of Crop Varieties. Newdelhi: Oxford & IBH publishing company, 1984.
MLA aipamenaAgrawal, R L. Identification of Crop Varieties. Oxford & IBH publishing company, 1984.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.