MLA International Bibliography.
New York: Modern Language Association, 1921–. See this entry in Databases and Indexes in Literature, page 40.
Ethnologue
http://www.ethnologue.com. A database of information on world languages, including information about geographic distribution, dialects, numbers of
speakers, and linguistic affiliation. The site includes a bibliography. Maintained by SIL International, an organization that
promotes language study for international faith-based work, this database is particularly strong for basic information about
lesser-known and endangered languages.
iLoveLanguages
http://www.ilovelanguages.com. Formerly known as The Human-Languages Page, this site offers links to language-related Internet resources. Of particular interest is the Languages section, which contains
categories such as languages, dictionaries, lessons, and so on.
Encyclopedia of Language and Education.
Ed. Nancy H. Hornberger. 2nd ed. 10 vols. New York: Springer, 2008. Covers a wide range of topics, from bilingual education
and language policy to language testing and research methods.
International Encyclopedia of Linguistics.
Ed. William J. Frawley. 2nd ed. 4 vols. New York: Oxford University Press, 2003. Includes scholarly articles on all aspects
of linguistics along with helpful bibliographies for further research.