Graff, W. L. (1964). Language and languages: An introduction to linguistics. Russell and Russell.
Chicago-viite (17. p.)Graff, Willem Laurens. Language and Languages: An Introduction to Linguistics. New York: Russell and Russell, 1964.
MLA-viite (9. p.)Graff, Willem Laurens. Language and Languages: An Introduction to Linguistics. Russell and Russell, 1964.
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