APA (7th ed.) Citation

Krzywka, R., & Korolko, J. (1961). Ex Libris Jana Korolko.

Chicago Style (17th ed.) Citation

Krzywka, Ryszard, and Jan Korolko. Ex Libris Jana Korolko. [S.l, 1961.

MLA (9th ed.) Citation

Krzywka, Ryszard, and Jan Korolko. Ex Libris Jana Korolko. 1961.

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