Brassley, P. Agriculture: A Very Short Introduction. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Brassley, Paul. Agriculture: A Very Short Introduction. Oxford University Press.
Lua MLA (9ú heag.)Brassley, Paul. Agriculture: A Very Short Introduction. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.