Gaya APA
Problems in International Relations. (1955).
Boston:
Prentice Hall.
Gaya Chicago
Problems in International Relations.
.
Boston:
Prentice Hall,
1955.
Text.
Gaya MLA
Problems in International Relations.
.
Boston:
Prentice Hall,
1955.
Text.
Gaya Turabian
Problems in International Relations.
Boston:
Prentice Hall,
1955.
Print.