@article{education2014212C0,
author={Vargas, Carlos Eduardo de Carvalho},
title={Preface},
journal={American Journal of Educational Research},
volume={2},
number={12C},
pages={0--0},
year={2014},
url={http://pubs.sciepub.com/education/2/12C/0},
issn={2333-4770},
doi={10.12691/education-2-12C-0}
publisher={Science and Education Publishing}
}