2
Published 2009
National Academies Press

3
Published 1996
National Academy Press

4
Published 2013
Department of Maternal, Newborn, Child and Adolescent Health, World Health Organization

5
by Tsui, Amy Ong
Published 1997
National Academy Press

6
Published 1998
National Academy Press

7
Published 2011
National Academies Press

8
Published 2009
RCOG Press

9
Published 1991
National Academy Press

10
Published 1991
National Academy Press

11
by Jonsen, Albert R.
Published 1993
National Academy Press

12
Published 1998
National Academy Press

13
Published 1995
National Academy Press

14
Published 1998
National Academy Press

15
Published 2003
National Academies Press

16
Published 2004
National Academies Press

17
Published 2006
National Academies Press

18
Published 1997
National Academy Press

19
Published 2000
National Academy Press

20
Published 2009
World Health Organization, Department of Child and Adolescent Health and Development