Mimin, Ninawati  (2018) Development of sex education books for elementary school students.  JURNAL INDRIA (Jurnal Ilmiah Pendidikan Prasekolah Dan Sekolah Awal), 3 (3).  pp. 212-220.  ISSN ISSN : 2579-7255 (Print) ISSN : 2528-004X (Online)