APA Style
The New Book of Knowledge : Volume 20 W-X-Y-Z. (2000).
America:
Grolier Internasional.
Chicago Style
The New Book of Knowledge : Volume 20 W-X-Y-Z.
.
America:
Grolier Internasional,
2000.
Buku.
MLA Style
The New Book of Knowledge : Volume 20 W-X-Y-Z.
.
America:
Grolier Internasional,
2000.
Buku.
Turabian Style
The New Book of Knowledge : Volume 20 W-X-Y-Z.
America:
Grolier Internasional,
2000.
Buku.