“Pengaruh Bauran Pemasaran Terhadap Keputusan Pembelian Siswa SMA Dan Alumni Di Kabupaten Sidoarjo Atas Jasa Bimbingan Belajar Delta”. Management Studies and Entrepreneurship Journal (MSEJ) 5, no. 5 (June 13, 2024): 31–44. Accessed May 23, 2026. https://journal.yrpipku.com/index.php/msej/article/view/2678.