APA (7th ed.) Citation

Heyke, L., & Ellwart, J. (2025). Leon Heyke. Kreativer Sp. z o.o..

Chicago Style (17th ed.) Citation

Heyke, Leon, and Jarosław Ellwart. Leon Heyke. Gdynia : Szemud: Kreativer Sp. z o.o., 2025.

MLA (9th ed.) Citation

Heyke, Leon, and Jarosław Ellwart. Leon Heyke. Kreativer Sp. z o.o., 2025.