H. . Siregar, I. Indrayani, M. . Khaddafi, Y. Yanita, and H. . Irawati, “THE INFLUENCE OF MOTIVATION AND LEADERSHIP STYLE ON EMPLOYEE PERFORMANCE AT THE ENVIRONMENT AND FORESTRY SERVICE OF RIAU ISLANDS PROVINCE”, IJSET, vol. 1, no. 3, pp. 133–144, Feb. 2022.