Ateneo de Manila University Loyola Schools, 2006, {s.a}
Majalah, Jurnal, Buletin
Office of Research and Publications Loyola Schools,
Majalah, Jurnal, Buletin
Office of Research and publications loyola schools,
Majalah, Jurnal, Buletin
Carol S. Pearson, editor
Berrett-Koehler, 2012
Buku Teks
Heller, Steven, auhtor
Rockport publishers, 2011
Buku Teks