APA

Villiger Mark E,, . (1985). Customary international law and treaties : A study of their interactions and interrelations with special consideration of the year 1969 Vienna convention on the law of treaties. Boston: Martinus Nijhoff Publishers.

Chicago

Villiger Mark E,, . 1985. Customary international law and treaties : A study of their interactions and interrelations with special consideration of the year 1969 Vienna convention on the law of treaties. Boston: Martinus Nijhoff Publishers.

Harvard

Villiger Mark E,, . (1985). Customary international law and treaties : A study of their interactions and interrelations with special consideration of the year 1969 Vienna convention on the law of treaties. Boston: Martinus Nijhoff Publishers.

MLA

Villiger Mark E,, . Customary international law and treaties : A study of their interactions and interrelations with special consideration of the year 1969 Vienna convention on the law of treaties. Boston: Martinus Nijhoff Publishers. 1985.