APA Style
The world book book encyclopedia U-V Volume 20. (2007).
Chicago:
World book Inc.
Chicago Style
The world book book encyclopedia U-V Volume 20.
.
Chicago:
World book Inc,
2007.
Umum.
MLA Style
The world book book encyclopedia U-V Volume 20.
.
Chicago:
World book Inc,
2007.
Umum.
Turabian Style
The world book book encyclopedia U-V Volume 20.
Chicago:
World book Inc,
2007.
Umum.