TADDAGA, Tsafitri Rinti; MUHID, Abdul. The Effectiveness of Psychological Capital Training to Improve the Optimism Attitude in Mandiri Enterprises: Literature Review. Jurnal Ekonomi, Bisnis & Entrepreneurship, [S. l.], v. 16, n. 1, p. 50–59, 2022. DOI: 10.55208/dknmhw86. Disponível em: https://jebe.stiepas.org/index.php/jebe/article/view/194. Acesso em: 7 oct. 2026.