Cita APA (7a ed.)
(1989). Year Book. The 1989 World Book: A Review of the Events of 1988. The World Book,Inc.
Cita Chicago Style (17a ed.)
Year Book. The 1989 World Book: A Review of the Events of 1988. Chicago: The World Book,Inc, 1989.
Cita MLA (9a ed.)
Year Book. The 1989 World Book: A Review of the Events of 1988. The World Book,Inc, 1989.
Precaución: Estas citas no son 100% exactas.