Graff, W. L. (1964). Language and languages: An introduction to linguistics. Russell and Russell.
Lua i Stíl Chicago (17ú heag.)Graff, Willem Laurens. Language and Languages: An Introduction to Linguistics. New York: Russell and Russell, 1964.
Lua MLA (9ú heag.)Graff, Willem Laurens. Language and Languages: An Introduction to Linguistics. Russell and Russell, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.