Cita APA (7a ed.)

Richmond, T. K., & Subramanian, S. V. (2009). School variation in asthma: Compositional or contextual? Public Library of Science (PLoS).

Cita Chicago Style (17a ed.)

Richmond, Tracy K., y S V. Subramanian. School Variation in Asthma: Compositional or Contextual? Public Library of Science (PLoS), 2009.

Cita MLA (8a ed.)

Richmond, Tracy K., y S V. Subramanian. School Variation in Asthma: Compositional or Contextual? Public Library of Science (PLoS), 2009.