“Enhancing Customer Loyalty in Mushroom Seed Market: Role of Product Quality and After-Sales Service: Meningkatkan Loyalitas Pelanggan di Pasar Bibit Jamur: Peran Kualitas Produk dan Layanan Purna Jual” (2023) Indonesian Journal of Law and Economics Review, 18(3). doi:10.21070/ijler.v18i3.954.