APA (7th ed.) Citation

Hahn, A., Pakusch, C., & Stevens, G. Low-fare public transport and modal shift – Lessons from Bonn, Germany. Elsevier.

Chicago Style (17th ed.) Citation

Hahn, Andreas, Christina Pakusch, and Gunnar Stevens. Low-fare Public Transport and Modal Shift – Lessons from Bonn, Germany. Elsevier.

MLA (9th ed.) Citation

Hahn, Andreas, et al. Low-fare Public Transport and Modal Shift – Lessons from Bonn, Germany. Elsevier.