B. Bunga Oktora, “THE RELATIONSHIP BETWEEN LEVELS OF KNOWLEDGE WITH BEHAVIOR OF PROPER HAND-WASHING IN THE FIFTH GRADE STUDENTS MARDIYUANA ELEMENTARY SCHOOL BOGOR: HUBUNGAN TINGKAT PENGETAHUAN DENGAN PERILAKU MENCUCI TANGAN YANG BENAR PADA SISWA KELAS V DI SD MARDIYUANA BOGOR”, Jurnal Ilmiah Wijaya, vol. 11, no. 1, pp. 99-106, May 2019.