APA (7th ed.) Citation

Jakubowski, W., & Jensch, R. (1986). Ex Libris Ruth Jensch.

Chicago Style (17th ed.) Citation

Jakubowski, Wojciech, and Ruth Jensch. Ex Libris Ruth Jensch. [Gdynia, 1986.

MLA (9th ed.) Citation

Jakubowski, Wojciech, and Ruth Jensch. Ex Libris Ruth Jensch. 1986.

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