APA (7th ed.) Citation

Rubens, P. P., & Kehrer, H. (1919). Peter Paul Rubens. H. Schmidt.

Chicago Style (17th ed.) Citation

Rubens, Peter Paul, and Hugo Kehrer. Peter Paul Rubens. München: H. Schmidt, 1919.

MLA (9th ed.) Citation

Rubens, Peter Paul, and Hugo Kehrer. Peter Paul Rubens. H. Schmidt, 1919.

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