Zulaicha, Ratni. " PENGARUH CUSTOMIZATION BASIC MARKET ORIENTATION DAN COMPETITIVE BENCHMARKING TERHADAP CUSTOMER RETENTION USAHA KECIL KNALPOT DI PURBALINGGA" Performance: Jurnal Personalia, Financial, Operasional, Marketing dan Sistem Informasi [Online], Volume 13 Number 1 (5 April 2018)