Chutarat Sirichareon และ Sakita Moungmaithong. (2016) Ultrasonographic Evaluation of Cervical Length, Cervical Volume and Cervical Vascularization. <i>Siriraj Medical Journal</i>, <i>68</i>(5), 299-304.Chutarat Sirichareon และ Sakita Moungmaithong. "Ultrasonographic Evaluation of Cervical Length, Cervical Volume and Cervical Vascularization". Siriraj Medical Journal 68 (2016):299-304.Chutarat Sirichareon และ Sakita Moungmaithong. Ultrasonographic Evaluation of Cervical Length, Cervical Volume and Cervical Vascularization. Faculty of Medicine Siriraj Hospital:ม.ป.ท. 2016.