Mulyani, Dewi, and Peringatan Wawuru. “Pengaruh Layanan Purna Jual Terhadap Loyalitas Konsumen Pada Dealer Yamaha JG Purwakarta”. Jurnal Bisnis 11, no. 2 (December 5, 2023): 189–199. Accessed August 3, 2025. https://www.jurnal.stieb-perdanamandiri.ac.id/index.php/ilejurnalojs/article/view/49.