Wardhaugh, R., & Wardhaugh, R. (1977). Introduction to linguistics (2. edition.). New York, New York: McGraw-Hill.
Chicago Style CitationWardhaugh, Ronald, and Ronald Wardhaugh. Introduction to Linguistics. 2. edition. New York, New York: McGraw-Hill, 1977.
MLA CitationWardhaugh, Ronald, and Ronald Wardhaugh. Introduction to Linguistics. 2. edition. New York, New York: McGraw-Hill, 1977.
Warning: These citations may not always be 100% accurate.