Wierzbicki, A. (1921). The truth about Upper Silesia: A speech made in the Polish Diet on january 28th 1921 by deputy A. Wierzbicki : a resolution was passed by the Diet to publish this speech at the expense of the nation. Diet of the Polish Republic.
Cytowanie według stylu Chicago (wyd. 17)Wierzbicki, Andrzej. The Truth About Upper Silesia: A Speech Made in the Polish Diet on January 28th 1921 by Deputy A. Wierzbicki : A Resolution Was Passed by the Diet to Publish This Speech at the Expense of the Nation. Warsaw: Diet of the Polish Republic, 1921.
Cytowanie według stylu MLA (wyd. 9)Wierzbicki, Andrzej. The Truth About Upper Silesia: A Speech Made in the Polish Diet on January 28th 1921 by Deputy A. Wierzbicki : A Resolution Was Passed by the Diet to Publish This Speech at the Expense of the Nation. Diet of the Polish Republic, 1921.