Gaya APA
Purkitt, Helen E.. (2010).
World politics 09/10 (30th ed).
Boston:
McGraw Hill Higher Publication.
Gaya Chicago
Purkitt, Helen E..
World politics 09/10.
30th ed
Boston:
McGraw Hill Higher Publication,
2010.
Text.
Gaya MLA
Purkitt, Helen E..
World politics 09/10.
30th ed
Boston:
McGraw Hill Higher Publication,
2010.
Text.
Gaya Turabian
Purkitt, Helen E..
World politics 09/10.
30th ed
Boston:
McGraw Hill Higher Publication,
2010.
Print.