1
Published 2006
National Academies Press

3
Published 2004
National Academies Press

5
Published 2000
National Academy Press

6
Published 1991
National Academy Press

8
by Margie, Nancy Geyelin
Published 1999
National Academy Press

9
Published 2009
World Health Organization, Department of Child and Adolescent Health and Development

11
Published 2002
National Academies Press

14
by Blaasvær, Nora, Nøkleby, Heid, Johansen, Sissel, Berg, Rigmor C.
Published 2015
Norwegian Knowledge Centre for the Health Services

15
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)

17
Published 2011
National Academies Press

18
Published 2012
World Health Organization

19
by Kirkendall, Nancy J.
Published 2013
The National Academies Press