APA (7th ed.) Citation

Janeczek, Z., & Welfe, A. (1988). Ex Libris Aleksandra Welfe.

Chicago Style (17th ed.) Citation

Janeczek, Zbigniew, and Aleksander Welfe. Ex Libris Aleksandra Welfe. 1988.

MLA (9th ed.) Citation

Janeczek, Zbigniew, and Aleksander Welfe. Ex Libris Aleksandra Welfe. 1988.

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