Style de citation APA (7e éd.)
(1989). The 1989 world book year book.: The annual supplement to the world book encyclopedia (ed.). World book, Inc..
Style de citation Chicago (17e éd.)
The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: World book, Inc., 1989.
Style de citation MLA (9e éd.)
The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. World book, Inc., 1989.
Attention : ces citations peuvent ne pas être correctes à 100%.