Johnson, A. M., Gabriel, K. P., Ranjit, N., Kohl, H. W., & Spring, A. E. (2021). In-School, Out-of-School, and Weekend Physical Activity Levels Vary Across Sociodemographic Subgroups of US Adolescents. Journal of physical activity & health, 18(4), 418-425.

Johnson, Ashleigh M., Kelley Pettee Gabriel, Nalini Ranjit, Harold W. Kohl, and Andrew E. Spring. "In-School, Out-of-School, and Weekend Physical Activity Levels Vary Across Sociodemographic Subgroups of US Adolescents." Journal of Physical Activity & Health 18, no. 4 (2021): 418-425.

Johnson, Ashleigh M., et al. "In-School, Out-of-School, and Weekend Physical Activity Levels Vary Across Sociodemographic Subgroups of US Adolescents." Journal of Physical Activity & Health, vol. 18, no. 4, 2021, pp. 418-425.