Journal Article
Lüdtke, O.,
Robitzsch, A.,
Trautwein, U., &
Kunter, M. (2009). Assessing the impact of learning environments: How to use student ratings of classroom or school characteristics in multilevel modelling.
Contemporary Educational Psychology,
34(2), 120–131. https://doi.org/10.1016/j.cedpsych.2008.12.001