RAY, W. J., & RAVIZZA, R. (1984). Methods toward a science of behavior and experience.--Ed.2. Wadsworth.

RAY, William J., and Richard RAVIZZA. Methods Toward a Science of Behavior and Experience.--Ed.2. Belmont: Wadsworth, 1984.

RAY, William J., and Richard RAVIZZA. Methods Toward a Science of Behavior and Experience.--Ed.2. Wadsworth, 1984.