APA
Curtis B. N., . (1987). Cacao : guía del comerciante. Ginebra: Centro de Comercio Internacional. United Nations Conference on Trade and Development. General Agreement on Tariffs and Trade.
Chicago
Curtis Bronwyn N, . 1987. Cacao : guía del comerciante. Ginebra: Centro de Comercio Internacional. United Nations Conference on Trade and Development. General Agreement on Tariffs and Trade.
Harvard
Curtis B. N., . (1987). Cacao : guía del comerciante. Ginebra: Centro de Comercio Internacional. United Nations Conference on Trade and Development. General Agreement on Tariffs and Trade.
MLA
Curtis Bronwyn N, . Cacao : guía del comerciante. Ginebra: Centro de Comercio Internacional. United Nations Conference on Trade and Development. General Agreement on Tariffs and Trade. 1987.