This study seeks to examine empirically the effect of leadership style on organizational commitment and organizational effectiveness. The data are from all departments of the undergraduate program at the State University in Central Java, Indonesia. The study comprises all divisions of the undergraduate program, which amounted to 207 people. The method for sampling is based on simple random sampling. Structural equation modeling (SEM) is applied in order to analyze the data. The results show that integrative adaptive leadership style has a positive effect on teamwork and affective commitment. Therefore, in order to improve teamwork, the organization should be assisted in completing the introduction of collaborative conflict resolution. Moreover, affective commitment positively affects organizational effectiveness. Thus, it can be said that efforts to improve the organizational effectiveness, should be supported by affective commitment. The study further revealed that integrative adaptive leadership style has a positive effect on teamwork. This means better execution of integrative adaptive leadership, higher level of coordination and vice versa. Each member has different responsibilities and duties, and it can be done or resolved in different ways. If the leader can accommodate the creativity of the faculty and staff, a solid team can be formed.

Abstract
1. Introduction
2. Literature Review and HypothesesDevelopment
    2.1. Organizational Conflict
    2.2. Leadership
    2.3. Organizational Commitment
    2.4. Social Affiliate
    2.5. Organizational Effectiveness
    2.6. The Relationship between CollaborativeResolution and Integrative Adaptive Leadership
    2.7. The Relationship between CollaborativeResolution and Teamwork
    2.8. The Relationship between IntegrativeAdaptive Leadership and Teamwork
    2.9. The Relationship between CollaborativeResolution and Affective Commitment
    2.10. The Relationship between IntegrativeAdaptive Leadership and Affective Commitment
    2.11. The Relationship between AffectiveCommitment and Organizational Effectiveness
3. Research Methods
4. Results and Discussion
    4.1. Data Normality Evaluation
    4.2. Evaluation of Multicollinearity
    4.3. Full Model of SEM (Structure EquationModeling)
4. Conclusion
References

• S. MARTONO(Economic Faculty, Universitas Negeri Semarang)
• Moh. KHOIRUDDIN(Economic Faculty, Universitas Negeri Semarang)
• Andhi WIJAYANTO(Economic Faculty, Universitas Negeri Semarang)
• Siti RIDLOAH(Economic Faculty, Universitas Negeri Semarang)
• Nury Ariani WULANSARI(Economic Faculty, Universitas Negeri Semarang)
• Udin UDIN(Economic Faculty, Universitas Negeri Semarang)