Gaya APA
Lowi, T, J. et al (2009).
American Government:Power and Purpose .
USE,. New York London:
W.W Norton & Company.
Gaya MLA
Lowi, Theoder, J.. et al.
"American Government:Power and Purpose".
USE,. New York London:
W.W Norton & Company,
2009.
Buku AP.