Cita APA (7th ed.)

THE WORLD BOOK ENCYCLOPEDIA.. (1989). The world book encyclopedia: I. World Book.

Cita Chicago (17th ed.)

THE WORLD BOOK ENCYCLOPEDIA.. The World Book Encyclopedia: I. Chicago: World Book, 1989.

Cita MLA (9th ed.)

THE WORLD BOOK ENCYCLOPEDIA.. The World Book Encyclopedia: I. World Book, 1989.