“PENGARUH INPUT PROSES RELATIONSHIP MARKETING TERHADAP OUTPUT PROSES RELATIONSHIP MARKETING STUDI KASUS GRAND INNA MALIOBORO HOTEL & CONVENTION” (2019) Kajian Bisnis Sekolah Tinggi Ilmu Ekonomi Widya Wiwaha, 27(2), pp. 190–206. doi:10.32477/jkb.v27i2.62.