31
Gonzalez-Fernandez, Marlis.
| Demos Medical Pub |
2011
32
Jarvis, Carolyn.
| Elsevier/Saunders |
2012
33
American psychological association
| Amerca psychological association |
1974
34
American Psychological Association.
| American Psychological Association |
1974
35
Altick, Richard Daniel
| Macmillan |
1979
37
Orlich, Donald C.
| D.C. Heath |
1994
38
Muller, Gilbert H.
| Harper & Row |
1985
39
Kennedy, X. J.
| Bedford Books of St. Martin's Press |
1990
40
Nadell, Judith.
| Allyn and Bacon |
1997