Cita APA (7th ed.)

Berg, L. (2012). The baby signing bible: Baby sign language made easy. Avery.

Cita Chicago (17th ed.)

Berg, Laura. The Baby Signing Bible: Baby Sign Language Made Easy. New York: Avery, 2012.

Cita MLA (8th ed.)

Berg, Laura. The Baby Signing Bible: Baby Sign Language Made Easy. Avery, 2012.