Sriarporn , Punpilai, Nachanart Suntornlimsiri, Potjanee Phakphumi, Nisachon Ragsakun, Parinya Kisakul, and Adisak Puangsombat. 2020. “Development of a Multimedia Electronic Book ‘Role of Nurse in Postpartum Family Planning’”. Nursing Journal CMU 47 (1):25-34. https://he02.tci-thaijo.org/index.php/cmunursing/article/view/240723.