APA (7th ed.) Citation

Acredolo, L. P., & Goodwyn, S. (2009). Baby signs: How to talk with your baby before your baby can talk (Updated 3rd ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Acredolo, Linda P., and Susan Goodwyn. Baby Signs: How to Talk with Your Baby Before Your Baby Can Talk. Updated 3rd ed. New York: McGraw-Hill, 2009.

MLA (9th ed.) Citation

Acredolo, Linda P., and Susan Goodwyn. Baby Signs: How to Talk with Your Baby Before Your Baby Can Talk. Updated 3rd ed. McGraw-Hill, 2009.