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