APA

Polska, . (1942). The Mass extermination of Jews in German occupied Poland. London [etc.]: published on behalf of the Polish Ministry of Foreign Affairs by Hutchinson & Co.

Chicago

Polska, . 1942. The Mass extermination of Jews in German occupied Poland. London [etc.]: published on behalf of the Polish Ministry of Foreign Affairs by Hutchinson & Co.

Harvard

Polska, . (1942). The Mass extermination of Jews in German occupied Poland. London [etc.]: published on behalf of the Polish Ministry of Foreign Affairs by Hutchinson & Co.

MLA

Polska, . The Mass extermination of Jews in German occupied Poland. London [etc.]: published on behalf of the Polish Ministry of Foreign Affairs by Hutchinson & Co. 1942.