Cita APA (7a ed.)

Andres, C., & Baumgärtner, U. (2008). Horizonte (Gymnasium, Hessen, Dr. A 1.). Westermann.

Cita Chicago Style (17a ed.)

Andres, Christopher, y Ulrich Baumgärtner. Horizonte. Gymnasium, Hessen, Dr. A 1. Braunschweig: Westermann, 2008.

Cita MLA (9a ed.)

Andres, Christopher, y Ulrich Baumgärtner. Horizonte. Gymnasium, Hessen, Dr. A 1. Westermann, 2008.