“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): 190-206. https://doi.org/10.32477/jkb.v27i2.62.