TY  - BOOK
AU  - Masajo, Emma M.
TI  - Perceived effects of using physics essentials portfolio (PEP) and digital video disc (DVD) lectures on students achievement in physics
AV  - CD-01955t 
PY  - 2012///
CY  - San Pablo City 
PB  - Laguna State Polytechnic University
N1  - Master of Arts
ER  -