Cita APA (7a ed.)

Muther, R., & Gurlitt, C. Die Kunst. J. Bard.

Cita Chicago Style (17a ed.)

Muther, Richard, y Cornelius Gurlitt. Die Kunst. Berlin: J. Bard.

Cita MLA (9a ed.)

Muther, Richard, y Cornelius Gurlitt. Die Kunst. J. Bard.