Cita APA (7a ed.)

Huldschinsky, P. O., & Schoeller, A. (1920). Ex Libris Alfred Schoeller.

Cita Chicago Style (17a ed.)

Huldschinsky, Paul Oscar, y Alfred Schoeller. Ex Libris Alfred Schoeller. [Berlin, 1920.

Cita MLA (9a ed.)

Huldschinsky, Paul Oscar, y Alfred Schoeller. Ex Libris Alfred Schoeller. 1920.