MARTIN, G., & PEAR, J. (1999). Behavior modification: What it is and how to do it.--Ed.6. Prentice Hall.

MARTIN, Garry, and Joseph PEAR. Behavior Modification: What It Is and How to Do It.--Ed.6. New Jersey: Prentice Hall, 1999.

MARTIN, Garry, and Joseph PEAR. Behavior Modification: What It Is and How to Do It.--Ed.6. Prentice Hall, 1999.