Agrawal, R. L. (1980). Seed technology. Oxford & IBH.
Lua i Stíl Chicago (17ú heag.)Agrawal, Ratan Lal. Seed Technology. New Delhi: Oxford & IBH, 1980.
Lua MLA (8ú heag.)Agrawal, Ratan Lal. Seed Technology. Oxford & IBH, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.