Wulandari, R. A., N. Nadiroh, and B. Sumargo. “THE EFFECT OF COGNITIVE FLEXIBILITY ON IMPROVING CLEAN AND HEALTHY LIVING BEHAVIOR IN ELEMENTARY SCHOOL STUDENTS”. Jurnal Pensil : Pendidikan Teknik Sipil, Vol. 11, no. 3, Sept. 2022, pp. 282 -92, doi:10.21009/jpensil.v11i3.28426.