Activity Theory in PracticeHarry Daniels, Anne Edwards - undifferentiated, Yrjo Engeström, Tony Gallagher, Sten R. Ludvigsen · First published 2013Open the Tome
Learning Across SitesSten R. Ludvigsen, Andreas Lund, Ingvill Rasmussen, Roger Säljö · First published 2010Open the Tome
