Riyanto, Agus -. 2021. “STRATEGI PEMASARAN MELALUI COSTUMER RELATIONSHIP MARKETING “Studi Kasus RS Yasmin Banyuwangi 2019””. JPIM (Jurnal Penelitian Ilmu Manajemen) 6 (3):227-40. https://doi.org/10.30736/jpim.v6i3.822.