APA

Lefeber R, Fitzmaurice M, . (1991). The changing political structure of Europe : Aspects of international law. London: Martinus Nijhoff Publishers.

Chicago

Lefeber R, Fitzmaurice M, . 1991. The changing political structure of Europe : Aspects of international law. London: Martinus Nijhoff Publishers.

Harvard

Lefeber R, Fitzmaurice M, . (1991). The changing political structure of Europe : Aspects of international law. London: Martinus Nijhoff Publishers.

MLA

Lefeber R, Fitzmaurice M, . The changing political structure of Europe : Aspects of international law. London: Martinus Nijhoff Publishers. 1991.