APA
Lopez R. S., . (2005). Problems Encountered by the Secondary Science Teachers in all the National High Schools in Baler and San Luis. Aurora: ASCOT.
Chicago
Lopez Rica S, . 2005. Problems Encountered by the Secondary Science Teachers in all the National High Schools in Baler and San Luis. Aurora: ASCOT.
Harvard
Lopez R. S., . (2005). Problems Encountered by the Secondary Science Teachers in all the National High Schools in Baler and San Luis. Aurora: ASCOT.
MLA
Lopez Rica S, . Problems Encountered by the Secondary Science Teachers in all the National High Schools in Baler and San Luis. Aurora: ASCOT. 2005.