Cita APA (7a ed.)

Harvey, N., Dennison, E., Inskip, H., Godfrey, K., Wareham, N., Ekelund, U., & Cooper, C. (2007). Childhood physical activity is associated with bone mass at 4 years.

Cita Chicago Style (17a ed.)

Harvey, N., E. Dennison, H. Inskip, K. Godfrey, N. Wareham, U. Ekelund, y C. Cooper. Childhood Physical Activity Is Associated with Bone Mass at 4 Years. 2007.

Cita MLA (9a ed.)

Harvey, N., et al. Childhood Physical Activity Is Associated with Bone Mass at 4 Years. 2007.