Aurelio, Manuel Ted F. “Physical Activity Profile of Older Elementary School Children of Batac, Ilocos Norte Using the Modified Physical Activity Questionnaire for Older Children”. JPAIR Multidisciplinary Research 1, no. 1 (November 11, 2008): 161–175. Accessed May 2, 2025. https://www.philair.ph/index.php/jpair/article/view/35.