(Pantong Moonboupha) พ.ม., (Arphat Tiaotakul) อ.เ. and (Angkana Onthanee) อ.อ. 2018. A DEVELOPMENT OF KNOWLEDGE CONSTRUCTION PACKAGE BASED ON CONSTRUCTIVIST TO ENHANCE THE MATHEMATICS PROBLEM SOLVING ABILITY ON LOGARITHM FOR GRADE VII STUDENTS. Journal of Education and Innovation. 19, 4 (Jan. 2018), 172–187.