Villarreal-Calderón, A., Acuña, H., Villarreal-Calderón, J., Garduño, M., Henríquez-Roldán, C. F., Calderón-Garcidueñas, L., & Valencia-Salazar, G. (2002). Assessment of Physical Education Time and After-School Outdoor Time in Elementary and Middle School Students in South Mexico City: The Dilemma between Physical Fitness and the Adverse Health Effects of Outdoor Pollutant Exposure. Archives of Environmental Health, 57(5), 450. https://doi.org/10.1080/00039890209601437
Chicago Style (17th ed.) CitationVillarreal-Calderón, Anna, Hilda Acuña, Jessica Villarreal-Calderón, Mónica Garduño, Carlos F. Henríquez-Roldán, Lilian Calderón-Garcidueñas, and Gildardo Valencia-Salazar. "Assessment of Physical Education Time and After-School Outdoor Time in Elementary and Middle School Students in South Mexico City: The Dilemma Between Physical Fitness and the Adverse Health Effects of Outdoor Pollutant Exposure." Archives of Environmental Health 57, no. 5 (2002): 450. https://doi.org/10.1080/00039890209601437.
MLA (9th ed.) CitationVillarreal-Calderón, Anna, et al. "Assessment of Physical Education Time and After-School Outdoor Time in Elementary and Middle School Students in South Mexico City: The Dilemma Between Physical Fitness and the Adverse Health Effects of Outdoor Pollutant Exposure." Archives of Environmental Health, vol. 57, no. 5, 2002, p. 450, https://doi.org/10.1080/00039890209601437.
