1. 09.  Reference Elimination disorders in children and adolescents / by Christophersen, Edward R. Publication: Toronto : Hogrefe Pub., 2010 . vi, 84 p. : 26 cm. Date:2010 Availability: Copies available: (1), Actions:
2. 09.  Reference Parenting that works : building skills that last a lifetime / by Christophersen, Edward R. Publication: Washington, D.C. : American Psychological Association, 2003 . vi, 356 p. ; 22 cm. Date:2003 Availability: Copies available: (1), Actions:
3. 09.  Reference Elimination disorders in children and adolescents / by Christophersen, Edward R. Publication: Cambridge, MA ; | Toronto : Hogrefe, 2010 . vi, 84, [5] p. : 26 cm. Date:2010 Availability: Copies available: (1), Actions: