Schulz, W., Ainley, J., Fraillon, J., Losito, B., Agrusti, G., & Friedman, T. (2018). Becoming Citizens in a Changing World: IEA International Civic and Citizenship Education Study 2016 International Report. Cham: Springer International Publishing AG.

Schulz, Wolfram., John Ainley, Julian Fraillon, Bruno Losito, Gabriella Agrusti, and Tim Friedman. Becoming Citizens in a Changing World: IEA International Civic and Citizenship Education Study 2016 International Report. Cham: Springer International Publishing AG, 2018.

Schulz, Wolfram., et al. Becoming Citizens in a Changing World: IEA International Civic and Citizenship Education Study 2016 International Report. Cham: Springer International Publishing AG, 2018.