APA (7th ed.) Citation

(1981). Webster's Third New International Dictionary of the English language unabridged: With seven language dictionary. A Merriam-Webster.

Chicago Style (17th ed.) Citation

Webster's Third New International Dictionary of the English Language Unabridged: With Seven Language Dictionary. London: A Merriam-Webster, 1981.

MLA (8th ed.) Citation

Webster's Third New International Dictionary of the English Language Unabridged: With Seven Language Dictionary. A Merriam-Webster, 1981.