Dyfyniad APA
Barnhart, C. L., & Barnhart, R. K. (1992). The world book dictionary. World book.
Dyfyniad Arddull Chicago
Barnhart, Clarence L., and Robert K. Barnhart. The World Book Dictionary. Chicago: World book, 1992.
Dyfyniad MLA
Barnhart, Clarence L., and Robert K. Barnhart. The World Book Dictionary. World book, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.