aditya nanda priyatama, M. Zainudin, and S. Handoyo, “THE INFLUENCE OF SELF-EFFICACY, OPTIMISM, HOPE, AND RESILIENCE ON WORK ENGAGEMENT WITH MEDIATOR VARIABLE OF PERCEIVED ORGANIZATIONAL SUPPORT ON LECTURERS OF PUBLIC HIGHER EDUCATION INSTITUTIONS IN SURAKARTA”, JEHCP, vol. 7, no. 2, pp. 61–77, Apr. 2018.