ธนศิริจิรานนท์ รัตนาภรณ์. 2019. “High Risk Pregnancy: The Nurse Midwife Roles”. Journal of Ratchathani Innovative Health Sciences 3 (1). ๊Ubon Ratchathani, Thailand:1-11. https://he02.tci-thaijo.org/index.php/JRIHS/article/view/213342.