Mullis, I. V., Martin, M. O., Minnich, C. A., Stanco, G. M., Arora, A., Centurino, V. A., & Castle, C. E. (Eds.). (2012). TIMSS 2011 Encyclopedia: Education Policy and Curriculum in Mathematics and Science. Volume 2: L-Z and Benchmarking Participants. Amsterdam, The Netherlands: International Association for the Evaluation of Educational Achievement.