Gaya APA
Obama : The Historic Journey. (2009).
United States of America:
Penguin Group.
Gaya Chicago
Obama : The Historic Journey.
.
United States of America:
Penguin Group,
2009.
Teks.
Gaya MLA
Obama : The Historic Journey.
.
United States of America:
Penguin Group,
2009.
Teks.
Gaya Turabian
Obama : The Historic Journey.
United States of America:
Penguin Group,
2009.
Teks.