APA (7th ed.) Citation

(1989). The 1989 world book year book.: The annual supplement to the world book encyclopedia (ed.). World book, Inc..

Chicago Style (17th ed.) Citation

The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: World book, Inc., 1989.

MLA (9th ed.) Citation

The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. World book, Inc., 1989.