(2005). Appropriate technology: Small producers and food security.
Lua i Stíl Chicago (17ú heag.)Appropriate Technology: Small Producers and Food Security. 2005.
Lua MLA (9ú heag.)Appropriate Technology: Small Producers and Food Security. 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.