Gaya APA
Oconnor, R, E. (1990).
Politics and structure : essential of American national goverment .
California:
Kepustakaan Pupoler Gramedia.
Gaya MLA
Oconnor, Robert, E..
"Politics and structure : essential of American national goverment".
California:
Kepustakaan Pupoler Gramedia,
1990.
Text.