Cita APA (7a ed.)

Schade, W., & Kaiser, S. (2010). Max Beckmann.

Cita Chicago Style (17a ed.)

Schade, Werner, y Sonja Kaiser. Max Beckmann. Berlin, 2010.

Cita MLA (8a ed.)

Schade, Werner, y Sonja Kaiser. Max Beckmann. 2010.