Gaya APA
Boulding, Kenneth. (1984).
The Meanng of the twentieth century .
New York:
Harper.
Gaya Chicago
Boulding, Kenneth.
The Meanng of the twentieth century.
New York:
Harper,
1984.
Text.
Gaya MLA
Boulding, Kenneth.
The Meanng of the twentieth century.
New York:
Harper,
1984.
Text.
Gaya Turabian
Boulding, Kenneth.
The Meanng of the twentieth century.
New York:
Harper,
1984.
Print.