Syakur, A. “INSTRUCTIONAL MATERIALS OF SOCIAL COMUNICATION AND SCIENCES DEVELOPT BY ESP FOR UNDERGRADUATE STUDENTS OF PUBLIC ADMINISTRATION DEPARTMENTS IN STISOSPOL ‘WASKITA DHARMA’ MALANG PERIODE 2014-2015: Instructional Materials, English for Specific Purposes (ESP), Public Administration Departments”. JAMAK: Jurnal Administrasi Manajemen Dan Kepemimpinan, Vol. 2, no. 1, July 2020, pp. 1-15, https://ejurnal.waskitadharma.ac.id/index.php/jamak/article/view/25.