TY  - BOOK
A2  - H. Russell Bernard.
AU  - Bernard, Harvey Russell
ET  - 2nd ed.
KW  - Nauki społeczne metodologia. badania
NV  - XXXIII, 789 s. :
PY  - 2013
SN  - 9781412978545
TI  - Social research methods : qualitative and quantitative approaches /
ER  -