Arnold, John, Rossy Waworuntu, Kuntoro Mangkusubroto, Jann Hidajat Tjakraatmadja, and Wawan Dhewanto. 2002. “Indonesian Entrepreneur’s Barometer 2004 Successful Entrepreneur ( First Report )”. Jurnal Manajemen Teknologi 4 (1). https://journal.sbm.itb.ac.id/index.php/mantek/article/view/38.