Lähteet
- Kapp, K, O'Driscoll T: Learning in 3D (2010)
- Peter Twining (2010): Virtual Worlds and Education, Educational Research, 52:2, 117-122
- http://media.futurelab.org.uk/resources/documents/lit_reviews/Serious-Games_Review.pdf
- http://www2.le.ac.uk/departments/beyond-distance-research-alliance/learning-futures-academy/images/5stagesl.png
- Tekes: Virtuaalitilat - Tila-ohjelman tuloskatsaus, Tekesin julkaisu 11/2012