Marlapa, Eri. “Quality of Service and Community Disciplinary Officer With Quality Products for Variable Interviening Customer Satisfaction: National Savings Bank Syariah Branch Bogor Regency Cigombong”. International Review of Management and Marketing, vol. 10, no. 4, July 2020, pp. 132-9, https://econjournals.com./index.php/irmm/article/view/9946.