“ANALISA KEPUASAN KONSUMEN WAROENG SPESIAL SAMBAL ‘SS’ JALAN BANTUL DAERAH ISTIMEWA YOGYAKARTA”. Jurnal Optimal 18, no. 2 (Oktober 26, 2021): 105–128. Diakses Oktober 4, 2026. https://jurnal.stieieu.ac.id/index.php/opt/article/view/133.