TY  - BOOK
AU  - De Leon, Hector S. 
AU  - De Leon, Hector M., Jr. 
TI  - The National internal revenue code annotated : : (P.D. No. 1158, as amended up to R.A. No. 10021) / 
SN  - 9789712355769
U1  - LAW 343.59904 D37n 2011 vol. 1 
PY  - 2011///
CY  - Manila : 
PB  - Rex Book Store, 
KW  - Internal revenue law
KW  - Philippines.
N1  - Includes bibliographical references.
ER  -