BROWN, H. D. (2000). Principles of language and teaching.-- ed.4. Addison Wesley Longman.
Lua i Stíl Chicago (17ú heag.)BROWN, H. Douglas. Principles of Language and Teaching.-- Ed.4. New York: Addison Wesley Longman, 2000.
Lua MLA (9ú heag.)BROWN, H. Douglas. Principles of Language and Teaching.-- Ed.4. Addison Wesley Longman, 2000.
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