Here are some great sources using an E-reference source.
Gale Virtual Reference
Encyclopedia of Education 2nd ed.
Gale Encyclopedia of Multicultural America 2nd ed.
Encyclopedia of Children and Childhood: In History and Society.
Sage e-Reference Libraray
Encyclopedia of Distributed Learning
Encylopedia of Educational Leadership and Administration:
Encyclopedia of School Psychology
Encyclopedia of Bilingual Education
Encyclopedia of Children, Adolescents, and Media
Encyclopedia of Education Law
21st Century Education: A Reference Handbook
Encyclopedia of Educational Psychology
Encyclopedia of Human Development
Encyclopedia of the Social and Cultural Foundations of Education
Encyclopedia of Behavior Modification and Cognitive Behavior Therapy
Encyclopedia of Gender and Society
ebrary
Encyclopedia of African-American Education
Encyclopedia of Multicultural Education
Routledge Encyclopedia of Language Teaching and Learning
Here are some selected Reference books for you to use.