Te Impact of Organizational Justice on the Organiza- tional Citizenship Behavior of Contract Workers in In- donesia: Te Role of Exchange Quality and Multifocal Trust Jati Waskito a , Kussudyarsana a , Imronudin a , Winda Linansya a a Universitas Muhammadiyah Surakarta, Indonesia Abstract: Tis study aims to examine the role of the double mediation of cognition-based trust and afect-based trust, along with the quality of the exchanges (perceived organi- zational support/POS and leader-member exchange/LMX), on the infuence of organi- zational justice on organizational citizenship behavior (OCB). Te survey involved 182 contract lecturers from the fve top Muhammadiyah universities in Indonesia. Using structural equation models, this study has succeeded in demonstrating that the quality of the individual exchanges between supervisors and subordinates (LMX and afective-based trust) successfully mediate the sources of justice from the supervisors (interactional and informational justice). Te quality of the individual exchanges with organizations (cogni- tive-based trust and POS) successfully mediate the sources of the organization (procedur- al justice). Implications for the theory and practice are discussed. Keywords: POS, LMX, trust, organizational justice, OCB JEL Classifcation: L2 *Corresponding author’s e-mail: jw271@ums.ac.id ISSN: PRINT 1411-1128 | ONLINE 2338-7238 http://journal.ugm.ac.id/gamaijb 72 Gadjah Mada International Journal of Business - January-April, Vol. 25, No. 1, 2023 Gadjah Mada International Journal of Business Vol. 25, No. 1 (January-April 2023): 72-92