Gaya APA
Posner, Richard A. (1990).
The Problem of jurisprudence .
New York:
Harvard.
Gaya Chicago
Posner, Richard A.
The Problem of jurisprudence.
New York:
Harvard,
1990.
Text.
Gaya MLA
Posner, Richard A.
The Problem of jurisprudence.
New York:
Harvard,
1990.
Text.
Gaya Turabian
Posner, Richard A.
The Problem of jurisprudence.
New York:
Harvard,
1990.
Print.