APA (7th ed.) Citation

Jakubowski, S., & Piekarski, K. (1924). Ex libris Casim. Piekarski.

Chicago Style (17th ed.) Citation

Jakubowski, Stanisław, and Kazimierz Piekarski. Ex Libris Casim. Piekarski. [S.l, 1924.

MLA (9th ed.) Citation

Jakubowski, Stanisław, and Kazimierz Piekarski. Ex Libris Casim. Piekarski. 1924.

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