“Analisi Penerapan Layanan Pickup And Delivery Terhadap Loyalitas Konsumen (Studi Pada Cuci Sepatu Medan)”. PUBLIK REFORM 8, no. 1 (September 29, 2021): 51–68. Accessed October 4, 2026. https://jurnal.dharmawangsa.ac.id/index.php/jupublik/article/view/1472.