Encyclopedias should not be overlooked; they can serve as a source of valuable information. Specialized encyclopedias provide detailed analyses of subjects and basic bibliographies. The articles are usually written by leading authorities in the field. 

1. Deighton, Lee C., ed. Encyclopedia of Education. 10 vols. New York: Macmillan, 1971. 
2. Dejnozka, Edward L. and David E. Kapel. American Educators' Encyclopedia. Westport, CT: Greenwood, 1982. 
3. Dunkin, Michael J., ed. International Encyclopedia of Teaching and Teacher Education. Oxford: Pergamon, 1987. 
4. Husen, Torsten, and T. Neville Postlethwaite, eds. International Encyclopedia of Education. 10 vols. Oxford: Pergamon, 1985. 
5. Knowles, Asa, ed. International Encyclopedia of Higher Education. 10 vols. San Francisco: Jossey-Bass, 1977. 
6. Sills, David L., ed. International Encyclopedia of the Social Sciences. 18 vols. New York: Macmillan, [1968-1979]. 
7. Unwin, Derick, and Ray McAleese. Encyclopedia of Educational Media, Communications, and Technology. Westport, CT: Greenwood, 1978.