1. American Academy of Child and Adolescent Psychiatry 2012 Policy statement on corporal punishment http://www.aacap.org/cs/root/policy_statements/policy_statement_on_corporal_punishment
2. Guidance for effective discipline;American Academy of Pediatrics, Committee on Psychosocial Aspects of Child and Family Health;Pediatrics,1998
3. American Humane Association 2009 Child protection position statements http://www.americanhumane.org/assets/pdfs/children/child-welfare-migration/au-childrens-division-position-statements-1.pdf
4. Ordinary physical punishment: Is it harmful? Comment on Gershoff (2002);Baumrind;Psychological Bulletin,2002
5. Use of harsh physical discipline and developmental outcomes in adolescence;Bender;Development and Psychopathology,2007