APA (7th ed.) Citation

Freymann, R. v., & Freymann, I. v. (1902). Ex Libris Irene De Freymann.

Chicago Style (17th ed.) Citation

Freymann, Rudolf von, and Irene von Freymann. Ex Libris Irene De Freymann. 1902.

MLA (9th ed.) Citation

Freymann, Rudolf von, and Irene von Freymann. Ex Libris Irene De Freymann. 1902.

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