Bader. (1970). The Integration of The State Insurance Into The Economic System of The German Democratic Republic. The Institute of National Planning.
Chicago (17e ed.) BronvermeldingBader. The Integration of The State Insurance Into The Economic System of The German Democratic Republic. Cairo: The Institute of National Planning, 1970.
MLA (9e ed.) BronvermeldingBader. The Integration of The State Insurance Into The Economic System of The German Democratic Republic. The Institute of National Planning, 1970.