Cita APA (7th ed.)

Wardhaugh, R. (1977). Introduction to linguistics (2.). McGraw Hill Book.

Cita Chicago (17th ed.)

Wardhaugh, Ronald. Introduction to Linguistics. 2. New York, Estados Unidos: McGraw Hill Book, 1977.

Cita MLA (9th ed.)

Wardhaugh, Ronald. Introduction to Linguistics. 2. McGraw Hill Book, 1977.