Butlak, Nowarat, Wilawan Phanphruk, และ Chongruk Ettarat. 2012. “FACTORS INFLUENCING SUPERVISION ACTIVITIES OF THE UNOFFICIAL-TIME NURSING SUPERVISORS AT THANYARAK INSTITUTE AND DRUG DEPENDENCE TREATMENT CENTER DEPARTMENT OF MEDICAL SERVICES MINISTRY OF PUBLIC HEALTH”. วารสารพยาบาลศาสตร์และสุขภาพ 34 (1). Khonkaen, Thailand:50-57. https://he01.tci-thaijo.org/index.php/nah/article/view/777.