Andreson, M.W., M. Teisl, G. Criner, S. Tisher, S. Smith, M. Hunter, S. Norton, J. Jellison, A. Alyokhin, E. Gallandt, S. Haggard, and E. Bicknell. 2007. Attitude changes of undergraduate university students in general education courses. The Journal of General Education 56: 149-168.