APA (7th ed.) Citation

Krzywka, R., & Hoffmann, M. (1957). Ex Libris Marii Hoffmann.

Chicago Style (17th ed.) Citation

Krzywka, Ryszard, and Maria Hoffmann. Ex Libris Marii Hoffmann. [S.l.], 1957.

MLA (9th ed.) Citation

Krzywka, Ryszard, and Maria Hoffmann. Ex Libris Marii Hoffmann. 1957.

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