APA Style

United States. Department of Army, St. Louis, Kelsen, Hans. (). Introduction to the problems of legal theory . : .

Chicago Style

United States. Department of Army, St. Louis, Kelsen, Hans. Introduction to the problems of legal theory. : , . .

MLA Style

United States. Department of Army, St. Louis, Kelsen, Hans. Introduction to the problems of legal theory. : , . .

Turabian Style

United States. Department of Army, St. Louis, Kelsen, Hans. Introduction to the problems of legal theory. : , . .