«Psychologist license». State of California. Consultado el 25 de octubre de 2008. While previous versions of this page indicated his license had expired in April 2008, the website was updated in June 2008 to reflect a 2010 expiration date.
Balmer, Randall (2007-08). «The Wizard of Colorado Springs». Sojourners Magazine. Archivado desde el original el 13 de junio de 2008. Consultado el 26 de junio de 2008. "his breakthrough book, Dare to Discipline, [...] challenged the permissive child-rearing techniques of Benjamin Spock. The book, published in 1970, encouraged parents to spank their children with belts or switches and to leave such items on the child's dresser to remind her of the consequences of challenging authority"
Balmer, Randall (2007-08). «The Wizard of Colorado Springs». Sojourners Magazine. Archivado desde el original el 13 de junio de 2008. Consultado el 26 de junio de 2008. "his breakthrough book, Dare to Discipline, [...] challenged the permissive child-rearing techniques of Benjamin Spock. The book, published in 1970, encouraged parents to spank their children with belts or switches and to leave such items on the child's dresser to remind her of the consequences of challenging authority"
