APA (7th ed.) Citation

Krzywka, R., & Petrowicz, T. (1957). Ex Libris Tadeusza Petrowicza.

Chicago Style (17th ed.) Citation

Krzywka, Ryszard, and Tadeusz Petrowicz. Ex Libris Tadeusza Petrowicza. [S. l, 1957.

MLA (9th ed.) Citation

Krzywka, Ryszard, and Tadeusz Petrowicz. Ex Libris Tadeusza Petrowicza. 1957.

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