Wallaya Chupradist. (2000) It utilization in public organizations and its impact on job performance. National Institute of Development Administration,:ม.ป.ท.Wallaya Chupradist. 2000. It utilization in public organizations and its impact on job performance. ม.ป.ท.:National Institute of Development Administration,;Wallaya Chupradist. It utilization in public organizations and its impact on job performance. ม.ป.ท.:National Institute of Development Administration, 2000. Print.