Não informado. Extension circular. Nebraska Agricultural Experiment Station.
Lua i Stíl Chicago (17ú heag.)Não informado. Extension Circular. Lincoln, Neb: Nebraska Agricultural Experiment Station.
Lua MLA (8ú heag.)Não informado. Extension Circular. Nebraska Agricultural Experiment Station.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.