Lathifah, E.L. and man, S. 2018. Design of Mathematics Student Worksheet based on Discovery Learning Approach to Improving Mathematical Representation Ability Students of Grade VII Junior High School in Indonesia. International Journal of Engineering & Technology. 7, 4.30 (Nov. 2018), 26–30. DOI:https://doi.org/10.14419/ijet.v7i4.30.21996.