Polish Research Centre (Londyn). (1942). German failures in Poland: Natural obstacles to Nazi population policy. Polish Research Centre.
Style de citation Chicago (17e éd.)Polish Research Centre (Londyn). German Failures in Poland: Natural Obstacles to Nazi Population Policy. London: Polish Research Centre, 1942.
Style de citation MLA (9e éd.)Polish Research Centre (Londyn). German Failures in Poland: Natural Obstacles to Nazi Population Policy. Polish Research Centre, 1942.
Attention : ces citations peuvent ne pas être correctes à 100%.