Gaya APA
Kelsen, Hans. (1992).
Introduction to the problems of legal theory .
London:
Clarendon.
Gaya Chicago
Kelsen, Hans.
Introduction to the problems of legal theory.
London:
Clarendon,
1992.
Text.
Gaya MLA
Kelsen, Hans.
Introduction to the problems of legal theory.
London:
Clarendon,
1992.
Text.
Gaya Turabian
Kelsen, Hans.
Introduction to the problems of legal theory.
London:
Clarendon,
1992.
Print.