APA

Friedmann W. G., . (1964). The changing structure of international law. New York: Columbia University Press.

Chicago

Friedmann Wolfgang Gaston, . 1964. The changing structure of international law. New York: Columbia University Press.

Harvard

Friedmann W. G., . (1964). The changing structure of international law. New York: Columbia University Press.

MLA

Friedmann Wolfgang Gaston, . The changing structure of international law. New York: Columbia University Press. 1964.