APA (7th ed.) Citation
Wardhaugh, R. (1977). Introduction to linguistics (2nd ed.). McGraw-Hill.
Chicago Style (17th ed.) Citation
Wardhaugh, Ronald. Introduction to Linguistics. 2nd ed. New York: McGraw-Hill, 1977.
MLA (9th ed.) Citation
Wardhaugh, Ronald. Introduction to Linguistics. 2nd ed. McGraw-Hill, 1977.
Warning: These citations may not always be 100% accurate.