Stephens, A. (1990). Dictionary of agriculture. Peter Collin Publishing.
Lua i Stíl Chicago (17ú heag.)Stephens, Alan. Dictionary of Agriculture. Teddington, Middlesex: Peter Collin Publishing, 1990.
Lua MLA (9ú heag.)Stephens, Alan. Dictionary of Agriculture. Peter Collin Publishing, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.