TY  - BOOK
AU  - Ragin,Charles C.
TI  - Constructing social research: The unity and diversity of method 
T2  - Sociology for a New Century
SN  - 0803990219
PY  - 1994///
CY  - Thousands Oaks, California
PB  - Pine Forge press
KW  - Ciencias sociales
KW  - Metodología
ER  -