Mahabal, R. (1980). High yielding varieties of crops. Oxford & IBH publishing co. pvt. ltd.
Chicago Style aipamenaMahabal, Ram. High Yielding Varieties of Crops. New Delhi: Oxford & IBH publishing co. pvt. ltd, 1980.
MLA aipamenaMahabal, Ram. High Yielding Varieties of Crops. Oxford & IBH publishing co. pvt. ltd, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.