Cita APA (7th ed.)
Kling, B., & Krüger, T. (2013). Signage: Spatial orientation (First edition.). Edition Detail.
Cita Chicago (17th ed.)
Kling, Beate, i Torsten Krüger. Signage: Spatial Orientation. First edition. Munich: Edition Detail, 2013.
Cita MLA (9th ed.)
Kling, Beate, i Torsten Krüger. Signage: Spatial Orientation. First edition. Edition Detail, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.