Não informado. (1962). Half-yearly progress report. West African Cocoa Research Institute.
Chicagoスタイル(17版)引用形式Não informado. Half-yearly Progress Report. Tafo, Gana: West African Cocoa Research Institute, 1962.
MLA(8版)引用形式Não informado. Half-yearly Progress Report. West African Cocoa Research Institute, 1962.
警告: この引用は必ずしも正確ではありません.