Yulian, E., Paryanto, E. and Hapsara, S. 2008. The duration of playing Play Station@ as a risk factor of obesity in school age children in Yogyakarta. Paediatrica Indonesiana. 48, 1 (Feb. 2008), 15-7. DOI:https://doi.org/10.14238/pi48.1.2008.15-7.