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References
Paul Cobb
The contributions of the transactional perspective to instructional design and the analysis of learning in social context![Open Access Link](images/OAlink.png)
2011
in: Theories of learning and studies of instructional practice, Dordrecht : Springer
![Open Access Link](images/OAlink.png)
2011
in: Theories of learning and studies of instructional practice, Dordrecht : Springer