Gaya APA
The World Book student discovery encyclopedia A-1. (2000).
Amerika:
World book.
Gaya Chicago
The World Book student discovery encyclopedia A-1.
.
Amerika:
World book,
2000.
Buku.
Gaya MLA
The World Book student discovery encyclopedia A-1.
.
Amerika:
World book,
2000.
Buku.
Gaya Turabian
The World Book student discovery encyclopedia A-1.
Amerika:
World book,
2000.
Buku.