APA (7th ed.) Citation
Barnhart, C. L., & Barnhart, R. K. (1992). <The> World Book Dictionary. World Book.
Chicago Style (17th ed.) Citation
Barnhart, Clarence L., and Robert K. Barnhart. <The> World Book Dictionary. Chicago: World Book, 1992.
MLA (9th ed.) Citation
Barnhart, Clarence L., and Robert K. Barnhart. <The> World Book Dictionary. World Book, 1992.
Warning: These citations may not always be 100% accurate.