APA Style
The world book encyclopedia X-X-Y-Z Volume 21. (2007).
Chicago:
World book Inc.
Chicago Style
The world book encyclopedia X-X-Y-Z Volume 21.
.
Chicago:
World book Inc,
2007.
Umum.
MLA Style
The world book encyclopedia X-X-Y-Z Volume 21.
.
Chicago:
World book Inc,
2007.
Umum.
Turabian Style
The world book encyclopedia X-X-Y-Z Volume 21.
Chicago:
World book Inc,
2007.
Umum.