TY  - BOOK
A2  - by John Gerring.
AU  - Gerring, John
ET  - 2nd ed., 4th print.
KW  - Nauki społeczne metodologia.
NV  - XXV, 495 s. :
PY  - 2013
SN  - 9780521132770
SN  - 9780521115049
TI  - Social science methodology : a unified framework /
ER  -