APA

Schuman F. L., . (1953). International politics: the western state system in mid-century. New York: McGraw-Hill.

Chicago

Schuman Frederick Lewis, . 1953. International politics: the western state system in mid-century. New York: McGraw-Hill.

Harvard

Schuman F. L., . (1953). International politics: the western state system in mid-century. New York: McGraw-Hill.

MLA

Schuman Frederick Lewis, . International politics: the western state system in mid-century. New York: McGraw-Hill. 1953.