HENG-TSUNG HUANGHung, S.-T.A.S.-T.A.HungHENG-TSUNG HUANGHung, S.-T.A.S.-T.A.Hung2018-09-102018-09-102010http://www.scopus.com/inward/record.url?eid=2-s2.0-77955759636&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/358473[SDGs]SDG4Implementing electronic speaking portfolios: Perceptions of EFL students: Colloquiumjournal article10.1111/j.1467-8535.2009.00996.x