Cita APA (7a ed.)

Keil, A. (2013). Pedestrian Bridges: Ramps, walkways, structures (1. Aufl.). Detail.

Cita Chicago Style (17a ed.)

Keil, Andreas. Pedestrian Bridges: Ramps, Walkways, Structures. 1. Aufl. Munich: Detail, 2013.

Cita MLA (9a ed.)

Keil, Andreas. Pedestrian Bridges: Ramps, Walkways, Structures. 1. Aufl. Detail, 2013.