Natthakun Hnujak. (2005) Leadership, organizational climate, job empowerment, and service quality management of head nurses in regional and ceneral hospitals in the central region. Mahidol University,:ม.ป.ท.Natthakun Hnujak. 2005. Leadership, organizational climate, job empowerment, and service quality management of head nurses in regional and ceneral hospitals in the central region. ม.ป.ท.:Mahidol University,;Natthakun Hnujak. Leadership, organizational climate, job empowerment, and service quality management of head nurses in regional and ceneral hospitals in the central region. ม.ป.ท.:Mahidol University, 2005. Print.