APA (7th ed.) Citation

Jaer, O., & Maag, B. (1946). Ex Libris B. Maag.

Chicago Style (17th ed.) Citation

Jaer, Olaf, and Bernhard Maag. Ex Libris B. Maag. [S.l, 1946.

MLA (9th ed.) Citation

Jaer, Olaf, and Bernhard Maag. Ex Libris B. Maag. 1946.

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