APA (7th ed.) Citation

Whymper, R. (1990). Cocoa and chocolate: Their chemistry and manufacture. J.& A. Churchill.

Chicago Style (17th ed.) Citation

Whymper, R. Cocoa and Chocolate: Their Chemistry and Manufacture. London: J.& A. Churchill, 1990.

MLA (8th ed.) Citation

Whymper, R. Cocoa and Chocolate: Their Chemistry and Manufacture. J.& A. Churchill, 1990.

Warning: These citations may not always be 100% accurate.