2
Published 1996
National Academy Press

3
by Tsui, Amy Ong
Published 1997
National Academy Press

4
Published 2009
RCOG Press

5
Published 1991
National Academy Press

6
by Jonsen, Albert R.
Published 1993
National Academy Press

7
Published 1998
National Academy Press

8
Published 1998
National Academy Press

9
Published 2004
National Academies Press

10
by Margie, Nancy Geyelin
Published 1999
National Academy Press

11
Published 2004
National Academies Press

12
by Gilford, Dorothy M.
Published 1988
National Academy Press

13
Published 1988
National Academy Press

14
Published 2004
The National Academies Press

15
Published 1989
National Academy Press

16
by Hernandez, Donald J.
Published 1998
National Academy Press

17
by Citro, Constance F.
Published 1998
National Academy Press

18
Published 2016
Tampere University Press

19
Published 2005
U.S. Dept. of Health & Human Services, Office of the Surgeon General

20
Published 2002
National Academies Press