APA

,, . (1990). United Nations commission on international law year book.Vol XXI. New York: United Nations.

Chicago

,, . 1990. United Nations commission on international law year book.Vol XXI. New York: United Nations.

Harvard

,, . (1990). United Nations commission on international law year book.Vol XXI. New York: United Nations.

MLA

,, . United Nations commission on international law year book.Vol XXI. New York: United Nations. 1990.