Sittigool1*, Wanwisa. 2024. “Causal Factors Affecting the Parcel Operational Effectiveness of Tertiary Level Hospital in Phitsanulok Province”. Public Health Innovation Research and Development - การวิจัยและพัฒนานวัตกรรมสาธารณสุข 2 (1):43-67. https://thaidj.org/index.php/phird/article/view/12145.