22
Hill, Robert C.
| Blackwell Publishing |
2005
23
Hill, Robert C.
| Blackwell Publishing |
2004
24
Harvey, Aminifu R.
| NASW Press |
2004
25
Lent, Robert W.
| A.P.A |
2003
28
Hill, Robert Lee
| The Faculty of the Southern Baptist Theological Seminary |
2001
30
Lund, Dale A.
| The Gerontological Society of America |
1995