Cita APA

Eckardt, F., Ruiz Sanchez, J., & Eckardt, F. (2015). City of crisis. Bielefeld.

Chicago Style Citation

Eckardt, Frank, Javier Ruiz Sanchez, i Frank Eckardt. City of Crisis. Bielefeld, 2015.

Cita MLA

Eckardt, Frank, Javier Ruiz Sanchez, i Frank Eckardt. City of Crisis. Bielefeld, 2015.