APA (7th ed.) Citation

Shopen, T., & Williams, J. M. (1981). Style and variables in english. Winthrop Publishers.

Chicago Style (17th ed.) Citation

Shopen, Timothy, and Joseph M. Williams. Style and Variables in English. Cambridge: Winthrop Publishers, 1981.

MLA (8th ed.) Citation

Shopen, Timothy, and Joseph M. Williams. Style and Variables in English. Winthrop Publishers, 1981.

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