Autistic Spectrum Disorders: Best Practice Guidelines for Screening, Diagnosis and Assessment  by the California Department of Developmental Services.

(XAB ASD 2002)
Based on validated scientific evidence, clinical experience and clinical judgment, the Guidelines provides professionals, policymakers, parents and other stakeholders with detailed “best practice” recommendations and rationale for screening, evaluating and assessing individuals suspected of having autistic spectrum disorders. Pp. 183.

If available, this can be checked out from the resource room at no cost.