APA (7th ed.) Citation

Héroux, B., & Sieler, W. (1906). Ex Libris Sieler Wilhelm.

Chicago Style (17th ed.) Citation

Héroux, Bruno, and Wilhelm Sieler. Ex Libris Sieler Wilhelm. [Miejsce nieznane], 1906.

MLA (9th ed.) Citation

Héroux, Bruno, and Wilhelm Sieler. Ex Libris Sieler Wilhelm. 1906.

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