Wardhaugh, R. (1977). Introduction to linguistics (2nd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Wardhaugh, Ronald. Introduction to Linguistics. 2nd ed. New York: McGraw-Hill, 1977.
Lua MLA (9ú heag.)Wardhaugh, Ronald. Introduction to Linguistics. 2nd ed. McGraw-Hill, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.