Cita APA (7th ed.)

Barth, F. (1992). Olaf Metzel. Ed. Cantz.

Cita Chicago (17th ed.)

Barth, Frank. Olaf Metzel. Stuttgart: Ed. Cantz, 1992.

Cita MLA (8th ed.)

Barth, Frank. Olaf Metzel. Ed. Cantz, 1992.