G. B. Geroda and W. S. Pane, “THE EFFECT OF USING POWERPOINT MEDIA ON STUDENTS’ ENGLISH LEARNING MOTIVATION TO THE ELEVENTH GRADE STUDENTS OF SMK MUHAMADYAH 1 SAMARINDA IN 2018/2019 ACADEMIC YEAR”, pen. mahakam. j. pendidik. dasar., vol. 3, no. 3, pp. 249–254, Apr. 2019.