Cita APA (7th ed.)

Schmied, W. (1975). Caspar David Friedrich: Wieland Schmied (1.). DuMont.

Cita Chicago (17th ed.)

Schmied, Wieland. Caspar David Friedrich: Wieland Schmied. 1. Köln: DuMont, 1975.

Cita MLA (8th ed.)

Schmied, Wieland. Caspar David Friedrich: Wieland Schmied. 1. DuMont, 1975.