Irwanto I, Emma Rumahlewang,, Asep Saefullah Kamali, et al. METODOLOGI PENELITIAN KUALITATIF: Pendekatan Konseptual Dan Operasional. Widina Media Utama; 2026. Accessed November 6, 2026. https://omp.penerbitwidina.com/index.php/widina/catalog/book/1