APA (7th ed.) Citation

Gumkowski, J., & Leszczynski, K. (1961). L'occupation hitlerienne en Pologne. Polonia.

Chicago Style (17th ed.) Citation

Gumkowski, Janusz, and Kazimierz Leszczynski. L'occupation Hitlerienne En Pologne. Warsaw: Polonia, 1961.

MLA (8th ed.) Citation

Gumkowski, Janusz, and Kazimierz Leszczynski. L'occupation Hitlerienne En Pologne. Polonia, 1961.