APA (7th ed.) Citation

Random House. (2001). Random house webster's unabridged dictionary (Second edition.). Random House.

Chicago Style (17th ed.) Citation

Random House. Random House Webster's Unabridged Dictionary. Second edition. USA: Random House, 2001.

MLA (9th ed.) Citation

Random House. Random House Webster's Unabridged Dictionary. Second edition. Random House, 2001.

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