TY  - BOOK
AU  - Engel, Rafael J.
TI  - The Practice of research in social work 
SN  - 978 1 452 22546 3
U1  - 361 3072 ENG 
PY  - 2013///
CY  - Los Angeles 
PB  -  SAGE
KW  - SOCIAL SERVICE RESEARCH
ER  -