TY  - BOOK
AU  - Tull Donald S.
AU  -  Hawkins Del I., 
TI  - Marketing Research. Ed. 6th
SN  - 81-203-0961-6
U1  - 658.83 
PY  - 1993///
CY  - New Delhi
PB  - Prentice Hall of India Private Limited
ER  -