APA (7th ed.) Citation

Wenig, B., & Schulz, R. (1900). Ex Libris Richard Schulz.

Chicago Style (17th ed.) Citation

Wenig, Bernhard, and Richard Schulz. Ex Libris Richard Schulz. [S.l.], 1900.

MLA (9th ed.) Citation

Wenig, Bernhard, and Richard Schulz. Ex Libris Richard Schulz. 1900.

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