Juliater Simarmata, Yuyus Suryana, Umi Kaltum, Yevis Marty Oesman, Airline Customer Retention in Indonesia 2015, International Journal of Management Sciences and Business Research 02(2016):41-53 DOI: 10.5281/zenodo.3463897

Dian C. Anggara, Yuyus Suryana, Umi Kaltum, The Influence Of Company Reputation And Business Strategy To Company Performance On General Insurance Company In Indonesia, International Journal of Management Sciences and Business Research 01(2016):59-67 DOI: 10.5281/zenodo.3463818

M. Basuki Wibowo, Sucherly, Umi Kaltum, Ernie Tisnawati Sule, The Effect Of Business Environment And Company Resources On Company Reputation And The Implication To The Performance Of Ferry Companies In Indonesia., International Journal of Management Sciences and Business Research 11(2016):156-167 DOI: 10.5281/zenodo.3466399