APA (7th ed.) Citation

Walkowski, G. K. (2021). The history of Poland and its socio-political system up to 1138 (First edition.). Wydawnictwo Czarna Perła.

Chicago Style (17th ed.) Citation

Walkowski, Grzegorz Kazimierz. The History of Poland and Its Socio-political System Up to 1138. First edition. Bydgoszcz: Wydawnictwo Czarna Perła, 2021.

MLA (9th ed.) Citation

Walkowski, Grzegorz Kazimierz. The History of Poland and Its Socio-political System Up to 1138. First edition. Wydawnictwo Czarna Perła, 2021.

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