Gaya APA
Beers, Burton F. (1990).
World History: Patterns of Civilization .
New Jersey:
Prentice-Hall.
Gaya Chicago
Beers, Burton F.
World History: Patterns of Civilization.
New Jersey:
Prentice-Hall,
1990.
Buku.
Gaya MLA
Beers, Burton F.
World History: Patterns of Civilization.
New Jersey:
Prentice-Hall,
1990.
Buku.
Gaya Turabian
Beers, Burton F.
World History: Patterns of Civilization.
New Jersey:
Prentice-Hall,
1990.
Buku.