(1959). Eastern underground activity against West Berlin. Senator for the Interior.
Chicago-Zitierstil (17. Ausg.)Eastern Underground Activity Against West Berlin. Berlin-Wilmersdorf: Senator for the Interior, 1959.
MLA-Zitierstil (8. Ausg.)Eastern Underground Activity Against West Berlin. Senator for the Interior, 1959.
警告：这些引文格式不一定是100％准确.