AYUNI, D. M. Pengaruh Promosi Penjualan dan Kualitas Layanan terhadap Loyalitas Pelanggan Guardian Health & Beauty Retail. Jurnal Manajemen dan Bisnis Madani, [S. l.], v. 2, n. 2, 2021. Disponível em: https://journal.paramadina.ac.id/index.php/madani/article/view/341. Acesso em: 28 mar. 2024.