Não informado. Extension bulletin. Oregon Agricultural College Extension Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Extension Bulletin. Corvallis, Ore: Oregon Agricultural College Extension Service.
Lua MLA (8ú heag.)Não informado. Extension Bulletin. Oregon Agricultural College Extension Service.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.