APA (7th ed.) Citation

Houghton, J. D., & Hendry, G. A. F. (1992). Natural food colorants. Blackie.

Chicago Style (17th ed.) Citation

Houghton, J. D., and G. A. F. Hendry. Natural Food Colorants. Glasgow: Blackie, 1992.

MLA (9th ed.) Citation

Houghton, J. D., and G. A. F. Hendry. Natural Food Colorants. Blackie, 1992.