Gaya APA
Principles of Political Economy. (2013).
New York:
Charles Scribners Sons.
Gaya Chicago
Principles of Political Economy.
.
New York:
Charles Scribners Sons,
2013.
.
Gaya MLA
Principles of Political Economy.
.
New York:
Charles Scribners Sons,
2013.
.
Gaya Turabian
Principles of Political Economy.
New York:
Charles Scribners Sons,
2013.
.