SAMPURNA, A. M.; MULAWI, M.; SADIANA, I. M. Profile of Mastery Chemical Bonding Concepts in Class X Students of Public Senior High School 4 Palangka Raya in Academic Year 2017/2018. Jurnal Ilmiah Kanderang Tingang, v. 11, n. 1, p. 14-29, 30 Jun. 2020.