Cita APA (7a ed.)

Wardhaugh, R. (1972). Introduction to linguistics. McGraw Hill Book.

Cita Chicago Style (17a ed.)

Wardhaugh, Ronald. Introduction to Linguistics. New York, Estados Unidos: McGraw Hill Book, 1972.

Cita MLA (9a ed.)

Wardhaugh, Ronald. Introduction to Linguistics. McGraw Hill Book, 1972.