APA (7th ed.) Citation

Friedman, S. L., & Sigman, M. (1981). Preterm birth and psychological development. Academic Press.

Chicago Style (17th ed.) Citation

Friedman, Sarah L., and Marian Sigman. Preterm Birth and Psychological Development. New York, N.Y.: Academic Press, 1981.

MLA (9th ed.) Citation

Friedman, Sarah L., and Marian Sigman. Preterm Birth and Psychological Development. Academic Press, 1981.