Não informado. (1963). Half-yearly progress report. Cocoa Research Institute of Ghana.
Lua i Stíl Chicago (17ú heag.)Não informado. Half-yearly Progress Report. Tafo, Gana: Cocoa Research Institute of Ghana, 1963.
Lua MLA (8ú heag.)Não informado. Half-yearly Progress Report. Cocoa Research Institute of Ghana, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.