APA (7th ed.) Citation

Preston, D. R., & Shuy, R. W. (1984). Varities of American English a reader. US. Information Agency.

Chicago Style (17th ed.) Citation

Preston, Dennis R., and Roger W. Shuy. Varities of American English a Reader. US. Information Agency, 1984.

MLA (8th ed.) Citation

Preston, Dennis R., and Roger W. Shuy. Varities of American English a Reader. US. Information Agency, 1984.

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