Cita APA (7a ed.)

Polish Research Centre (Londyn). (1942). German failures in Poland: Natural obstacles to Nazi population policy. Polish Research Centre.

Cita Chicago Style (17a ed.)

Polish Research Centre (Londyn). German Failures in Poland: Natural Obstacles to Nazi Population Policy. London: Polish Research Centre, 1942.

Cita MLA (9a ed.)

Polish Research Centre (Londyn). German Failures in Poland: Natural Obstacles to Nazi Population Policy. Polish Research Centre, 1942.