APA (7e ed.) Bronvermelding
(1987). The 1987 world book year book.: The annual supplement to the world book encyclopedia (ed.). World book, Inc..
Chicago (17e ed.) Bronvermelding
The 1987 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. Chicago: World book, Inc., 1987.
MLA (9e ed.) Bronvermelding
The 1987 World Book Year Book.: The Annual Supplement to the World Book Encyclopedia. ed. World book, Inc., 1987.
Let op: Deze citaties zijn niet altijd 100% accuraat.