Wardhaugh, R. (1986). An introduction to sociolinguistics. Blackwell.
Cita Chicago Style (17a ed.)Wardhaugh, Ronald. An Introduction to Sociolinguistics. New York, NY, USA: Blackwell, 1986.
Cita MLA (8a ed.)Wardhaugh, Ronald. An Introduction to Sociolinguistics. Blackwell, 1986.
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