Add this copy of Understanding and Affecting the Behavior of Young to cart. $74.11, new condition, Sold by discount_scientific_books rated 4.0 out of 5 stars, ships from Sterling Heights, MI, UNITED STATES, published 1994 by Pearson.
Add this copy of Understanding and Affecting the Behavior of Young to cart. $78.42, new condition, Sold by Media Smart rated 4.0 out of 5 stars, ships from Hawthorne, CA, UNITED STATES, published 1994 by Pearson Education.
