Cita APA (7th ed.)

Naumann, B., & Torra-Mattenklott, C. (2008). Schmutz - dirt. Böhlau.

Cita Chicago (17th ed.)

Naumann, Barbara, i Caroline Torra-Mattenklott. Schmutz - Dirt. Köln [u.a.]: Böhlau, 2008.

Cita MLA (8th ed.)

Naumann, Barbara, i Caroline Torra-Mattenklott. Schmutz - Dirt. Böhlau, 2008.