Não informado. (1963). Half-yearly progress report. Cocoa Research Institute of Ghana.
Chicagoスタイル(17版)引用形式Não informado. Half-yearly Progress Report. Tafo, Gana: Cocoa Research Institute of Ghana, 1963.
MLA(8版)引用形式Não informado. Half-yearly Progress Report. Cocoa Research Institute of Ghana, 1963.
警告: この引用は必ずしも正確ではありません.