“ANALISA KEPUASAN SENIOR MARKET TERHADAP KUALITAS LAYANAN DI HOTEL BINTANG 4 DAN BINTANG 5 DI SURABAYA”, jmk, vol. 9, no. 2, pp. pp. 135–143, Aug. 2008, doi: 10.9744/jmk.9.2.pp. 135-143.