Marlinawati, Iin Tri, Harsono Salimo, and Bhisma Murti. 2017. “Effect of Play Group and Biopsychosocial Factors on the Independence Development of Preschool Children in Surakarta”. Journal of Maternal and Child Health 2 (4):284-96. http://thejmch.com/index.php/thejmch/article/view/64.