Cita APA (7th ed.)

Wassmuth, J., & Bak, E. (2005). Gestalt der Zeit. Wassmuth.

Cita Chicago (17th ed.)

Wassmuth, Jürgen, i Eléonore Bak. Gestalt Der Zeit. Dortmund: Wassmuth, 2005.

Cita MLA (8th ed.)

Wassmuth, Jürgen, i Eléonore Bak. Gestalt Der Zeit. Wassmuth, 2005.