Não informado. (1962). Half-yearly progress report. West African Cocoa Research Institute.
Style de citation Chicago (17e éd.)Não informado. Half-yearly Progress Report. Tafo, Gana: West African Cocoa Research Institute, 1962.
Style de citation MLA (8e éd.)Não informado. Half-yearly Progress Report. West African Cocoa Research Institute, 1962.
Attention : ces citations peuvent ne pas être correctes à 100%.