APA (7th ed.) Citation

Janeczek, Z., & Sobottka, U. (1988). Ex Libris Ursula Sobottka.

Chicago Style (17th ed.) Citation

Janeczek, Zbigniew, and Ursula Sobottka. Ex Libris Ursula Sobottka. 1988.

MLA (9th ed.) Citation

Janeczek, Zbigniew, and Ursula Sobottka. Ex Libris Ursula Sobottka. 1988.

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