APA (7th ed.) Citation

Brown, E. J., & Sorensen, J. (2007). An overview of early intervention. PRO-ED.

Chicago Style (17th ed.) Citation

Brown, E. J., and Jane Sorensen. An Overview of Early Intervention. Austin, Tex: PRO-ED, 2007.

MLA (9th ed.) Citation

Brown, E. J., and Jane Sorensen. An Overview of Early Intervention. PRO-ED, 2007.