Howie, E. K., Harden, S. M., Barr-Anderson, D. J., & Long, C. R. (2025, March). Elementary school compliance with a state recess minimum requirement by racial and geographic factors: A cross-sectional study. International Journal of Behavioral Nutrition and Physical Activity.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Howie, Erin K., Samantha M. Harden, Daheia J. Barr-Anderson, و Christopher R. Long. "Elementary School Compliance with a State Recess Minimum Requirement by Racial and Geographic Factors: A Cross-sectional Study." International Journal of Behavioral Nutrition and Physical Activity Mar. 2025.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Howie, Erin K., et al. "Elementary School Compliance with a State Recess Minimum Requirement by Racial and Geographic Factors: A Cross-sectional Study." International Journal of Behavioral Nutrition and Physical Activity, Mar. 2025.