Gaya APA
Schroeder, Richard C. (1989).
American Covernment .
:
.
Gaya Chicago
Schroeder, Richard C.
American Covernment.
:
,
1989.
Text.
Gaya MLA
Schroeder, Richard C.
American Covernment.
:
,
1989.
Text.
Gaya Turabian
Schroeder, Richard C.
American Covernment.
:
,
1989.
Print.