APA

Tietjen A., . (1961). Soviet spy ring. New York: Coward-McCann.

Chicago

Tietjen Arthur, . 1961. Soviet spy ring. New York: Coward-McCann.

Harvard

Tietjen A., . (1961). Soviet spy ring. New York: Coward-McCann.

MLA

Tietjen Arthur, . Soviet spy ring. New York: Coward-McCann. 1961.