GEORGE, R. A. Vegetable seed production#Raymond A.T. Cambridge Press.
Lua i Stíl Chicago (17ú heag.)GEORGE, Raymond A.T. Vegetable Seed Production#Raymond A.T. Cambridge Press.
Lua MLA (8ú heag.)GEORGE, Raymond A.T. Vegetable Seed Production#Raymond A.T. Cambridge Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.