APA
Linda Acredolo ; Susan Goodwyn, . (1992). Baby signs : how to talk with your baby before your baby can talk. Illinois: Contemporary Books.
Chicago
Linda Acredolo ; Susan Goodwyn, . 1992. Baby signs : how to talk with your baby before your baby can talk. Illinois: Contemporary Books.
Harvard
Linda Acredolo ; Susan Goodwyn, . (1992). Baby signs : how to talk with your baby before your baby can talk. Illinois: Contemporary Books.
MLA
Linda Acredolo ; Susan Goodwyn, . Baby signs : how to talk with your baby before your baby can talk. Illinois: Contemporary Books. 1992.
