TY  - BOOK
AU  - Ragin,Charles C.
TI  - Constructing social research: The unity and diversity of method 
T2  - Sociology for a new century
SN  - 0-8039-9021-9
AV  - H62 R34
PY  - 1994///
CY  - Thousand oaks
PB  - Pine Forge Press
KW  - Ciencias sociales
KW  - Investigación
ER  -