Suratih S, Pujiastuti H. Analisis kesalahan siswa dalam menyelesaikan soal cerita program linear berdasarkan Newman’s error analysis. Pythagoras [Internet]. 2020 Dec. 18 [cited 2025 Jul. 11];15(2):111-23. Available from: https://journal.uny.ac.id/index.php/pythagoras/article/view/30990