Nur Indah, M. Amsyahar, Alamsyah Alamsyah, and R.Arvin I.Miracelova, “LEADERSHIP SKILLS AND MANAGERIAL COMPETENCE IN IMPROVING ORGANIZATIONAL PERFORMANCE: THE ROLE OF COMMUNICATION, COLLABORATION, AND EFFECTIVE DECISION-MAKING IN BUSINESS STRATEGY”, IJEBAS, vol. 6, no. 5, pp. 2750–2757, Sep. 2026.