แซ่ตั้น ช, กาละ ศ, ยังวนิชเศรษฐ ส. Effect of Positive Thinking and Relaxation Program on Reducing Stress among Pregnant Adolescents. Pnu Sci J [internet]. 2018 Jan. 15 [cited 2026 Aug. 28];10(1):27-39. available from: https://li01.tci-thaijo.org/index.php/pnujr/article/view/109337