Andreansyah, A. et al. 2021. A DEVELOPMENT LEARNING MEDIA APPLICATION OF SNAKES ON THE NERVOUS SYSTEM MATERIALS TO INCREASE LEARNING OUTCOMES AND CONCEPTS MASTERY OF HIGH SCHOOL STUDENTS IN THE 2020/2021 ACADEMIC YEAR. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW. 8, 1 (Jul. 2021), 45–54.