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Chicago-Zitierstil (17. Ausg.)Ott, Ellen, et al. "12-year Trends in Active School Transport Across Four European Countries: Findings from the Health Behaviour in School-Aged Children (HBSC) Study." International Journal of Environmental Research and Public Health 18, no. 4 (2021). https://doi.org/10.3390/ijerph18042118.
MLA-Zitierstil (9. Ausg.)Ott, Ellen, et al. "12-year Trends in Active School Transport Across Four European Countries: Findings from the Health Behaviour in School-Aged Children (HBSC) Study." International Journal of Environmental Research and Public Health, vol. 18, no. 4, 2021, https://doi.org/10.3390/ijerph18042118.