APA استشهاد

(1981). Report on cocoa survey 1980. Directorate of economics and statistics.

استشهاد بنمط شيكاغو

Report on Cocoa Survey 1980. Trivandrum: Directorate of economics and statistics, 1981.

MLA استشهاد

Report on Cocoa Survey 1980. Directorate of economics and statistics, 1981.