APA (7th ed.) Citation

Preston, D. R. (1989). Sociolinguistics and second language acquisition. B. Blackwell.

Chicago Style (17th ed.) Citation

Preston, Dennis Richard. Sociolinguistics and Second Language Acquisition. Oxford: B. Blackwell, 1989.

MLA (9th ed.) Citation

Preston, Dennis Richard. Sociolinguistics and Second Language Acquisition. B. Blackwell, 1989.

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