Penggayaan APA
The World Book Encyclopedia Vol. 21. (1989).
Chicago:
World Book Inc..
Chicago Style
The World Book Encyclopedia Vol. 21.
.
Chicago:
World Book Inc.,
1989.
Text.
MLA Style
The World Book Encyclopedia Vol. 21.
.
Chicago:
World Book Inc.,
1989.
Text.
Turabian Style
The World Book Encyclopedia Vol. 21.
Chicago:
World Book Inc.,
1989.
Print.