APA (7th ed.) Citation

Wardhaugh, R. (1993). Investigating language: Central problems in linguistics (1. publ.). Blackwell.

Chicago Style (17th ed.) Citation

Wardhaugh, Ronald. Investigating Language: Central Problems in Linguistics. 1. publ. Oxford u.a: Blackwell, 1993.

MLA (9th ed.) Citation

Wardhaugh, Ronald. Investigating Language: Central Problems in Linguistics. 1. publ. Blackwell, 1993.

Warning: These citations may not always be 100% accurate.