1. Janie C. Hartbarger and Neil J. Hartbarger, Eating for the Eighties: A Complete Guide to Vegetarian Nutrition (Philadelphia: W. B. Saunders, 1981);
2. Suzanne Havala and Johanna Dwyer, “Position of the American Dietetic Association: Vegetarian Diets—Technical Support Paper,” Journal of the American Dietetic Association 88 (March 1988), p. 352;
3. Michael Klapper, Pregnancy, Children, and the Vegan Diet (Umatilla, FL: Gentle World, 1988);
4. I. B. Vyhmeister, U. D. Register, and L. M. Sonnenberg, “Safe Vegetarian Diets for Children,” Pediatric Clinics of North America 24 (1985), pp. 203–210.
5. Hartbarger, 1981.