Rohimah, .-. (2017) “The use of backpacker learning technique to improve the memorize and students learning outcome on materials of comparing natural and social condition of neighboring countries”, International research journal of engineering, IT & scientific research, 3(2), pp. 104–113. Available at: https://sloap.org/journals/index.php/irjeis/article/view/537 (Accessed: 16 July 2024).