Gaya APA
The World Book Encyclopedia : S-Sn Volume 17. (1980).
chicago:
World book.
Gaya Chicago
The World Book Encyclopedia : S-Sn Volume 17.
Volume 17.
chicago:
World book,
1980.
Buku.
Gaya MLA
The World Book Encyclopedia : S-Sn Volume 17.
Volume 17.
chicago:
World book,
1980.
Buku.
Gaya Turabian
The World Book Encyclopedia : S-Sn Volume 17.
chicago:
World book,
1980.
Buku.