APA (7th ed.) Citation

Krzywka, R., & Bednarz, M. (1959). Ex Libris Marii Bednarz.

Chicago Style (17th ed.) Citation

Krzywka, Ryszard, and Maria Bednarz. Ex Libris Marii Bednarz. [S.l.], 1959.

MLA (9th ed.) Citation

Krzywka, Ryszard, and Maria Bednarz. Ex Libris Marii Bednarz. 1959.

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