21
Ritter, Bernhard.
| JC Hinrichs |
1879
22
Paxton, David
| (주)마스트미디어 |
2015
23
Capitman, John
| The Gerontological Society of America |
1997
24
Ritter, Jessica A.
| NASW Press |
2008
26
Ritter, Adolf Martin
| Walter De Gruyter GmbH |
2002
27
Ritter, Joshua R.
| The Faculty of the Southern Baptist Theological Seminary |
2013
28
Ritter, Dr. Werner H.
| 호남신학대학교 |
2007