TY  - BOOK
AU  - Copi,Irving M.
AU  - Cohen,Carl
AU  - Flage,Daniel E.
TI  - Essentials of logic
SN  - 013238034X
PY  - 2007///
CY  - Upper Saddle River, NJ
PB  - Pearson Prentice Hall
KW  - Logic
KW  - Textbooks
ER  -