Não informado. (1963). Half-yearly progress report. Cocoa Research Institute of Ghana.
Chicago-Zitierstil (17. Ausg.)Não informado. Half-yearly Progress Report. Tafo, Gana: Cocoa Research Institute of Ghana, 1963.
MLA-Zitierstil (8. Ausg.)Não informado. Half-yearly Progress Report. Cocoa Research Institute of Ghana, 1963.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.