Gaya APA

Belfer, L, L. (2004). Asperger's Syndrome in Young Children :A Developmental Guide for Parents and Professional . Sebastopol, CA: Jessica Kingsley.

Gaya MLA

Belfer, Laurie, Leventhal. "Asperger's Syndrome in Young Children :A Developmental Guide for Parents and Professional". Sebastopol, CA: Jessica Kingsley, 2004. Buku.