Ludwig-Walz, H., Siemens, W., Heinisch, S., Dannheim, I., Loss, J., & Bujard, M. (2023). How the COVID-19 pandemic and related school closures reduce physical activity among children and adolescents in the WHO European Region: A systematic review and meta-analysis. International journal of behavioral nutrition and physical activity, 20, . https://doi.org/10.1186/s12966-023-01542-x
Chicago Style (17th ed.) CitationLudwig-Walz, Helena, Waldemar Siemens, Sarah Heinisch, Indra Dannheim, Julika Loss, and Martin Bujard. "How the COVID-19 Pandemic and Related School Closures Reduce Physical Activity Among Children and Adolescents in the WHO European Region: A Systematic Review and Meta-analysis." International Journal of Behavioral Nutrition and Physical Activity 20 (2023). https://doi.org/10.1186/s12966-023-01542-x.
MLA (9th ed.) CitationLudwig-Walz, Helena, et al. "How the COVID-19 Pandemic and Related School Closures Reduce Physical Activity Among Children and Adolescents in the WHO European Region: A Systematic Review and Meta-analysis." International Journal of Behavioral Nutrition and Physical Activity, vol. 20, 2023, https://doi.org/10.1186/s12966-023-01542-x.