एपीए उद्धरण

Engels, J. M., Bartley, B. G., & Enríquez, G. A. (1979). Cocoa descriptors, their states and modus operandi.

शिकागो स्टाइल उद्धरण

Engels, Jon M.M., Basil G.D Bartley, और Gustavo A. Enríquez. Cocoa Descriptors, Their States and Modus Operandi. 1979.

एमएलए उद्धरण

Engels, Jon M.M., Basil G.D Bartley, और Gustavo A. Enríquez. Cocoa Descriptors, Their States and Modus Operandi. 1979.