Międzynarodowy raport z badania ICCS 2009
Schulz, W., Ainley, J., Fraillon, J., Kerr, D., Losito, B. (2010). ICCS 2009 International Report: Civic knowledge, attitudes, and engagement among lower-secondary school students in 38 countries. Amsterdam, The Netherlands: International Association for the Evaluation of Educational Achievement (IEA).