TY  - BOOK
AU  - LEON Alexis
AU  -  LEON Mathews
TI  - Introduction to information systems
SN  - 9788182090101
U1  - D6,9(B), P4 
PY  - 2004///
CY  -  New Delhi 
PB  - Tata McGraw Hill Education      
KW  - Commerce
N1  - Bibliography: p 189-98
ER  -