Sabri, T. W., I. Listiqowati, and E. Putra. “THE EFFECT OF ZONING SYSTEM ON STUDENTS’ LEARNING ACHIEVEMENT IN GRADE VII AT SMP NEGERI 9 PALU”. Jurnal Samudra Geografi, Vol. 7, no. 1, Jan. 2024, pp. 67 -4, doi:10.33059/jsg.v7i1.12069.