APA (7 वां संस्करण) प्रशस्ति पत्र

(1959). Eastern underground activity against West Berlin. Senator for the Interior.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Eastern Underground Activity Against West Berlin. Berlin-Wilmersdorf: Senator for the Interior, 1959.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Eastern Underground Activity Against West Berlin. Senator for the Interior, 1959.