APA (7th ed.) Citation

Langner, W. Z., & Langner, E. (1941). Ex Libris E. i W. Langnerów.

Chicago Style (17th ed.) Citation

Langner, Wiktor Zbigniew, and Elwira Langner. Ex Libris E. I W. Langnerów. 1941.

MLA (9th ed.) Citation

Langner, Wiktor Zbigniew, and Elwira Langner. Ex Libris E. I W. Langnerów. 1941.

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