21
by Olson, Steve
Published 2015
National Academies Press

23
by Alexander, Charlee M.
Published 2016
National Academies Press (US)

24
by Smedslund, Geir, Hagen, Kåre Birger, Steiro, Asbjørn, Johme, Torill
Published 2006
Knowledge Centre for the Health Services at The Norwegian Institute of Public Health (NIPH)

25
Published 2003
National Academies Press

26
Published 2004
National Academies Press

27
Published 2006
National Academies Press

28
Published 2009
National Academies Press

29
Published 2011
National Academies Press

31
Published 1997
National Academy Press

32
Published 2000
National Academy Press

33
Published 2004
The National Academies Press

34
by Kirkendall, Nancy J.
Published 2013
The National Academies Press

36
Published 2009
World Health Organization, Department of Child and Adolescent Health and Development

37
by Kandall, Stephen R.
Published 1993
U.S. Dept. of Health and Human Services, Public Health Service, Substance Abuse and Mental Health Services Administration, Center for Substance Abuse Treatment

38
Published 2009
World Health Organization, UNICEF

39
Published 2012
World Health Organization