Gaya APA
Ginsberg, B. et al (2013).
American Goverment Power and Purpose Thirteenth Edition .
Palangkaraya:
WW Norton & Company Inc..
Gaya MLA
Ginsberg, Benjamin. et al.
"American Goverment Power and Purpose Thirteenth Edition".
Palangkaraya:
WW Norton & Company Inc.,
2013.
Buku Teks.