Não informado. (2000). Comprehensive index of publications. American Society of Agricultural Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Comprehensive Index of Publications. St. Joseph, Mich: American Society of Agricultural Engineers, 2000.
Lua MLA (8ú heag.)Não informado. Comprehensive Index of Publications. American Society of Agricultural Engineers, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.