Cita APA

Purdy, I. B., Wiley, D. J., Smith, L. M., Howes, C., Gawlinski, A., Robbins, W., & Badr, L. K. (2008). Cumulative Perinatal Steroids: Child Development of Preterm Infants.

Chicago Style Citation

Purdy, Isabell B., Dorothy J. Wiley, Lynne M. Smith, Carollee Howes, Anna Gawlinski, Wendy Robbins, i Lina K. Badr. Cumulative Perinatal Steroids: Child Development of Preterm Infants. 2008.

Cita MLA

Purdy, Isabell B., et al. Cumulative Perinatal Steroids: Child Development of Preterm Infants. 2008.