Gaya APA

Idelberger, K. (2011). The World of Footbridges, From the Utilitarian to the Spectacular (1st Edition). Germany: Ernst & Sohn.

Gaya MLA

Idelberger, Klaus. "The World of Footbridges, From the Utilitarian to the Spectacular". 1st Edition Germany: Ernst & Sohn, 2011. Text.