The American Psychiatric Association website lists practice guidelines  that provide evidence-based recommendations for the assessment and treatment of psychiatric disorders.
For more details, visit these web pages:
Diagnostic and Statistical Manual of Mental Disorders (DSM-5)
National Institute on Alcohol Abuse and Alcoholism (NIAAA)
Primary Care Evaluation of Mental Disorders Patient Health Questionnaire
Suicide Screening Questions for the Emergency Department for Pediatric and Young Adults(NIMH)
Department of Veterans Affairs
National Center for Complementary and Alternative Medicine • National Institutes of Health
Watch Treating Anxiety Disorders, a six-part educational video series created to train master's-level clinicians.
Teaching Slides: CBT for Anxiety Disorders : CBT for GAD, panic disorder, and social anxiety disorder