1
Published in Philippine Star (2019)
Article
2
4
Published 2015
Book
5
6
7
Published 2011
Book
8
Published 2011
Book
9
Published 2009
Book
10
Published 2008
Book
11
12
Published 2008
Book
13
Published 2007
Electronic Book
14
Published 2007
Book
15
Published 2007
Book
16
17
by Lawagan, Ernesto Engr.
Published 2006
Book
18
19
Published 2005
Book
20
Published 2005
Book