Baumert, Jürgen Center for Educational Research, Max Planck Institute for Human Development, Max Planck Society; Max Planck Institute for Human Development, Max Planck Society;
Frey, A., Taskinen, P., Schütte, K., Prenzel, M., Artelt, C., Baumert, J., et al. (Eds.). (2009). PISA 2006: Skalenhandbuch. Dokumentation der Erhebungsinstrumente. Münster: Waxmann.