Fuentes:

Mauk JE, Reber M, Batshaw ML. Autism and other pervasive developmental disorders (4th edition). En: ML Batshaw, editor. Children with disabilities. Baltimore: Paul H. Brookes; 1997.

Powers MD. What is autism? In: MD Powers, editor. Children with autism: a parents' guide, 2nd edition. Bethesda, MD: Woodbine House; 2000. pp. 1-44.