APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.