APA (7th ed.) Citation

(1992). Webster's 21st century: Complete guide to speech, style and grammar. T. Nelson.

Chicago Style (17th ed.) Citation

Webster's 21st Century: Complete Guide to Speech, Style and Grammar. Nashville: T. Nelson, 1992.

MLA (9th ed.) Citation

Webster's 21st Century: Complete Guide to Speech, Style and Grammar. T. Nelson, 1992.