Não informado. (1985). Applied Engineering in Agriculture. American Society of Agricultural Engineers.
Lua i Stíl Chicago (17ú heag.)Não informado. Applied Engineering in Agriculture. St. Joseph, Mich: American Society of Agricultural Engineers, 1985.
Lua MLA (8ú heag.)Não informado. Applied Engineering in Agriculture. American Society of Agricultural Engineers, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.