APA (7th ed.) Citation

Ball Kylie, Salmon Jo, & Veitch Jenny. (2010). Individual, social and physical environmental correlates of children's active free-play: A cross-sectional study. BMC.

Chicago Style (17th ed.) Citation

Ball Kylie, Salmon Jo, and Veitch Jenny. Individual, Social and Physical Environmental Correlates of Children's Active Free-play: A Cross-sectional Study. BMC, 2010.

MLA (9th ed.) Citation

Ball Kylie, et al. Individual, Social and Physical Environmental Correlates of Children's Active Free-play: A Cross-sectional Study. BMC, 2010.