Gaya APA
PURKITT, HELEN E.. (2007).
WORLD POLITICS ANNUAL EDITIONS (EDISI KETUJUH BELAS).
USA:
MCGRAW HILL.
Gaya Chicago
PURKITT, HELEN E..
WORLD POLITICS ANNUAL EDITIONS.
EDISI KETUJUH BELAS
USA:
MCGRAW HILL,
2007.
Text.
Gaya MLA
PURKITT, HELEN E..
WORLD POLITICS ANNUAL EDITIONS.
EDISI KETUJUH BELAS
USA:
MCGRAW HILL,
2007.
Text.
Gaya Turabian
PURKITT, HELEN E..
WORLD POLITICS ANNUAL EDITIONS.
EDISI KETUJUH BELAS
USA:
MCGRAW HILL,
2007.
Print.