?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Wali&rft.au=Wali%2C+Esra+Ahmed&rft.aufirst=Esra+Ahmed&rft.date=2008&rft.tpages=274&rft.title=Reinterpreting+mobile+learning+%3A+an+activity+theoretic+analysis+of+the+use+of+portable+devices+in+higher+education&rft.inst=Institute+of+Education%2C+University+of+London&rft.degree=Doctoral