?url_ver=Z39.88-2004&rft_id=10.1145%2F3437802.3437826&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=N.T.&rft.au=Son%2C+N.T.&rft.aulast=Son&rft.date=2020&rft.title=An+Analysis+of+the+Effectiveness+of+Emergency+Distance+Learning+under+COVID-19&rft.isbn=9781450388054&rft.genre=proceeding