Dyfyniad APA
(1983). The 1983 world book year book.: The annual supplement to the world book encyclopedia (ed.). World book, Inc..
Dyfyniad Arddull Chicago
The 1983 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: World book, Inc., 1983.
Dyfyniad MLA
The 1983 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. World book, Inc., 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.