Pratidiana, Deni, and Nunung Muhayatun. “Analisis Kelancaran Prosedural Matematis Siswa Dalam Menyelesaikan Soal Program Linear”. UNION: Jurnal Ilmiah Pendidikan Matematika 9, no. 2 (July 30, 2021): 189–201. Accessed June 27, 2022. https://jurnal.ustjogja.ac.id/index.php/union/article/view/9369.