1. Abbott, S. E. (2013). 21st century skills definition. Accessed 7 Oct 2017, http://edglossary.org/21st-century-skills/
2. Aprea, C. (2008). Task-oriented coaching for teaching instructional planning: A design-based research approach. In G. Kanselaar, V. Jonker, P. A. Kirschner, & F. J. Prins (Eds.), International perspectives in the learning sciences: Creating a learning world (pp. 43–51). Utrecht, The Netherlands: University Press.
3. Aprea, C. (in press). Instruktionsdesign und Unterrichtsplanung. In H. Niegemann & A. Weinberger (Eds.), Handbuch Bildungstechnologien. Heidelberg, Germany: Springer.
4. Aprea, C., & Cattaneo, A. (in press). Designing technology-enhanced learning environments in vocational education and training. In L. Unwin & D. Guile (Eds.), The Wiley handbook of vocational education and training. London, UK: Wiley-Blackwell.
5. Aprea, C., Cattaneo, A., & Sappa, V. (2015). Mind the Gap: Boundary-Crossing an den Übergängen von informellem und formalem Lernen in der beruflichen Bildung. In G. Niedermair (Ed.), Informelles Lernen. Annäherungen - Problemlagen - Forschungsbefunde (pp. 265–280). Linz, Austria: Trauner.