TY  - BOOK
AU  - Layder, Derek 
TI  - Investigative research: theory and practice
SN  - 9781446287538
U1  - 300.1 LAY 
PY  - 2018///
CY  - London
PB  - Sage Publications Ltd.
KW  - Social sciences Methodology
KW  - Social sciences Research Methodology
ER  -