Sari, Nila, et al. “Analysis of The Influence of Marketing Strategies and Excellent Service on Increasing Sales Volume”. Jurnal Visionary : Penelitian Dan Pengembangan Dibidang Administrasi Pendidikan, vol. 13, no. 1, Apr. 2025, pp. 124-31, doi:10.33394/vis.v13i1.15596.