Citazione Stile APA (7a Edizione)

Gumkowski, J., Leszczyński, K., & Rothert, E. (1961). Poland under Nazi occupation. Polonia Publishing House.

Citazione stile Chigago Style (17a edizione)

Gumkowski, Janusz, Kazimierz Leszczyński, e Edward Rothert. Poland Under Nazi Occupation. Warszawa: Polonia Publishing House, 1961.

Citatione MLA (9a ed.)

Gumkowski, Janusz, et al. Poland Under Nazi Occupation. Polonia Publishing House, 1961.