Buala, Onanong, Somsak Suthutvoravut, Sanya Patrachai, and Vachira Singhakajen. 2009. “Factors Associated with Urinary Problems among Postpartum Women at Siriraj Hospital”. Research Medical Journal 32 (3):128-36. https://he02.tci-thaijo.org/index.php/ramajournal/article/view/175387.