Gaya APA
The World Book Encyclopedia : T Volume 19. (1980).
chicago:
World book.
Gaya Chicago
The World Book Encyclopedia : T Volume 19.
Volume 19.
chicago:
World book,
1980.
Buku.
Gaya MLA
The World Book Encyclopedia : T Volume 19.
Volume 19.
chicago:
World book,
1980.
Buku.
Gaya Turabian
The World Book Encyclopedia : T Volume 19.
chicago:
World book,
1980.
Buku.