Wittmann, M. C., Redish, E. F., Steinberg, R. N., & University of Maryland. Physics Education Research Group. (2004). Activity-based tutorials. John Wiley & Sons.

Wittmann, Michael C., Edward F. Redish, Richard N. Steinberg, and University of Maryland. Physics Education Research Group. Activity-based Tutorials. New Jersey: John Wiley & Sons, 2004.

Wittmann, Michael C., et al. Activity-based Tutorials. John Wiley & Sons, 2004.