Carroll, Leone R. "Fats". The World Book Encyclopedia, 1978. Chicago: World Book-Childcraft International, Inc., 1978, Vol. 7, Ppg. 55-56.

Clavendish, Marshall. Family Health. New York: The Marshall Clavendish Corp., (1993).

Hurly, Judith S. M.S., R.D. Nutrition and Health. Guilford, CT: Grolier Wellness Encyclopedia, (1992).

Mayer, Jean. "Nutrition". The World Book Encyclopedia, 1978. Chicago: Field Enterprises Educational Corp., (1971), Vol. 15, Ppg. 466-467.

Strength, Ralph D. "Proteins". The World Book Encyclopedia, 1972. Chicago: Field Enterprises Educational Corp., 1971, Vol.15, Ppg. 734-735.