Schoer, K., Deggau, M., & Seibel, S. (2003). Development of built-up and traffic area in Germany 1993 to 2001. Statistisches Bundesamt.
Cita Chicago (17th ed.)Schoer, Karl, Michael Deggau, i Steffen Seibel. Development of Built-up and Traffic Area in Germany 1993 to 2001. Wiesbaden: Statistisches Bundesamt, 2003.
Cita MLA (8th ed.)Schoer, Karl, et al. Development of Built-up and Traffic Area in Germany 1993 to 2001. Statistisches Bundesamt, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.