Não informado. Extension Circular. North Carolina Agricultural Extension Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Extension Circular. West Raleigh, NC: North Carolina Agricultural Extension Service.
Lua MLA (8ú heag.)Não informado. Extension Circular. North Carolina Agricultural Extension Service.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.