1. Betts, G. H. (1909). The distribution and functions of mental imagery. New York: Teachers College Press, Columbia University.
2. Campos, A., & Gonzalez, M. A. (in press). Imagery vividness and creativity. Perceptual & Motor Skills.
3. Campos, A., & Perez, M. J. (1989). High and low imagers and their scores on creativity. Perceptual & Motor Skills, 68, 403–406.
4. Durndell, A. J., & Wetherick, N. E. (1976). The relation of reported imagery to cognitive performance. British Journal of Psychology, 67, 501–506.
5. Ernest, C. H. (1977). Imagery ability and cognition: A critical review. Journal of Mental Imagery, 2, 181–216.