APA (7. basım) Alıntı
(1989). The 1989 world book year book.: The annual supplement to the world book encyclopedia (ed.). World book, Inc..
Chicago Style (17. basım) Atıf
The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: World book, Inc., 1989.
MLA (9th ed.) Atıf
The 1989 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. World book, Inc., 1989.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..