Cita APA (7a ed.)

Bürck, P., & Saeng, L. (1921). Ex Libris Lvdwig Saeng.

Cita Chicago Style (17a ed.)

Bürck, Paul, y Ludwig Saeng. Ex Libris Lvdwig Saeng. [Darmstadt, 1921.

Cita MLA (9a ed.)

Bürck, Paul, y Ludwig Saeng. Ex Libris Lvdwig Saeng. 1921.