Dillenbourg Pierre. Virtual Learning Environments.
Chicago-čujuhus (17. p.)Dillenbourg Pierre. Virtual Learning Environments.
MLA-čujuhus (9. p.)Dillenbourg Pierre. Virtual Learning Environments.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.