APA
Kelsen Hans,, . (1951). The law of United Nations : A critical analysis of its fundamental problems. London: Stevens & Sons.
Chicago
Kelsen Hans,, . 1951. The law of United Nations : A critical analysis of its fundamental problems. London: Stevens & Sons.
Harvard
Kelsen Hans,, . (1951). The law of United Nations : A critical analysis of its fundamental problems. London: Stevens & Sons.
MLA
Kelsen Hans,, . The law of United Nations : A critical analysis of its fundamental problems. London: Stevens & Sons. 1951.