Zuhri Efendi 2017. IMPROVING STUDENTS’ ABILITY IN WRITING ENGLISH TEACHING BY USING PORTFOLIO ASSESSMENT : (An Experimental Study at SMKN 1 Blang Pidie). Getsempena English Education Journal . 4, 2 (Nov. 2017), 152-163. DOI:https://doi.org/10.46244/geej.v4i2.748.