Não informado. (1941). Annual Coffee Statistics. Pan-American Coffee Bureau.
Lua i Stíl Chicago (17ú heag.)Não informado. Annual Coffee Statistics. New York: Pan-American Coffee Bureau, 1941.
Lua MLA (8ú heag.)Não informado. Annual Coffee Statistics. Pan-American Coffee Bureau, 1941.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.