HENG-TSUNG HUANG2018-09-102018-09-102010http://www.scopus.com/inward/record.url?eid=2-s2.0-79955886305&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/358471E-portfolio-based language learning and assessmentjournal article10.18848/1447-9494/cgp/v17i07/468862-s2.0-79955886305