APA (7th ed.) Citation

Kowalczyk, J. J. (1917). Prussian - Poland: A stronghold of German militarism. [s.n.].

Chicago Style (17th ed.) Citation

Kowalczyk, Jan Jakub. Prussian - Poland: A Stronghold of German Militarism. Copenhagen: [s.n.], 1917.

MLA (9th ed.) Citation

Kowalczyk, Jan Jakub. Prussian - Poland: A Stronghold of German Militarism. [s.n.], 1917.

Warning: These citations may not always be 100% accurate.