1. Abella, R. (1981). The development of the Preventive Health Behavior Scale. Unpublished manuscript, Purdue University.
2. Ajzen, I. & Fishbein, M. (1980). Understanding attitudes and predicting social behavior.Englewood, NJ: Prentice-Hall.
3. Bandura, A. (1977). Social learning theory.Englewood Cliffs, NJ: Prentice-Hall.
4. Relationship of health practices and mortality