TY  - BOOK
AU  - Adanza, Estela G. 
TI  - Research methods : : principles and applications 
SN  - 9712317870
AV  - LB 1047.3  .Ad3 2002
PY  - 2002///
CY  - Manila : 
PB  - Rex Book Store, 
N1  - EDU
ER  -