Carruthers, I. (1985). Tools for agriculture: A buyer's guide to low cost agricultural implements (3rd ed.). Intermediate Technology Publications Ltd.
Lua i Stíl Chicago (17ú heag.)Carruthers, Ian. Tools for Agriculture: A Buyer's Guide to Low Cost Agricultural Implements. 3rd ed. London: Intermediate Technology Publications Ltd, 1985.
Lua MLA (8ú heag.)Carruthers, Ian. Tools for Agriculture: A Buyer's Guide to Low Cost Agricultural Implements. 3rd ed. Intermediate Technology Publications Ltd, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.