APA Style
The world book encyclopedia. (1990).
USA:
World Book Inc..
Chicago Style
The world book encyclopedia.
.
USA:
World Book Inc.,
1990.
Text.
MLA Style
The world book encyclopedia.
.
USA:
World Book Inc.,
1990.
Text.
Turabian Style
The world book encyclopedia.
USA:
World Book Inc.,
1990.
Print.