Bungorn Supavititpatana และ Kobkul Phancharoenworakul. (2010) A casual model of Thai women's physical activity during second trimester of pregnancy. Mahidol University:ม.ป.ท.Bungorn Supavititpatana และ Kobkul Phancharoenworakul. 2010. A casual model of Thai women's physical activity during second trimester of pregnancy. ม.ป.ท.:Mahidol University;Bungorn Supavititpatana และ Kobkul Phancharoenworakul. A casual model of Thai women's physical activity during second trimester of pregnancy. ม.ป.ท.:Mahidol University, 2010. Print.