TY  - BOOK
AU  - Gamma,E.,et al
ED  - Helm, R
ED  - Johnson, R
ED  - Vlissides, J
TI  - Design patterns: elements of reusable object-oriented software
T2  - Addison-wesley professional computing series
SN  - 8178081350
U1  - 18 
PY  - 1995///
CY  - Singapore
PB  - Addison-Wesley
ER  -