U.S. TIMSS and PIRLS 2011 Technical Report and User’s Guide. NCES 2013-046

Kastberg, D., Roey, S., Ferraro, D., Lemanski, N., & Erberber, E. (2013). U.S. TIMSS and PIRLS 2011 Technical Report and User’s Guide. NCES 2013-046 (Rep.). Jessup, MD, USA: National Center for Education Statistics.