APA (7th ed.) Citation

(1979). Webster's New Twentieth century Dictionary Unbridged. [unkown publisher ].

Chicago Style (17th ed.) Citation

Webster's New Twentieth Century Dictionary Unbridged. United states: [unkown publisher ], 1979.

MLA (9th ed.) Citation

Webster's New Twentieth Century Dictionary Unbridged. [unkown publisher ], 1979.

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