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Daniel, F. and Taneo, P.N.L. 2019. Development of Graph Theory Textbooks to Improve Students’ Mathematical Representation Ability in Discrete Mathematics Subjects. Edumatica : Jurnal Pendidikan Matematika. 9, 02 (Nov. 2019), 64-70. DOI:https://doi.org/10.22437/edumatica.v9i02.7635.