Panjaitan, Hadi, Mark G. Maffett, Jopinus Saragih, Hendri Mayanta Tarigan, and Ben Setiawan. 2020. “THE INFLUENCE OF MOTIVATION ON WORK PRODUCTIVITY OF EMPLOYEES IN THE SUB-DISTRICT RAYA OFFICE SIMALUNGUN DISTRICT”. International Conference on Health Science, Green Economics, Educational Review and Technology 2 (December):303-16. https://doi.org/10.54443/ihert.v2i.75.