TY  - BOOK
AU  - Trochim,William M
AU  - Donnelly,James P;Kanika Arora
TI  - Research Methods: The Essential Knowledge Base
SN  - 9788131530856
U1  - 001.4 TRO.R 
PY  - 2018///
CY  - Delhi
PB  - Cengage Learning
ER  -