APA (7th ed.) Citation

Popp, M. c. 2. J., Velsinger, A., & Martini, L. (2013). And the boat goes backwards.

Chicago Style (17th ed.) Citation

Popp, Markus ca. 20./21. Jh, Antje Velsinger, and Lea Martini. And the Boat Goes Backwards. Berlin, 2013.

MLA (9th ed.) Citation

Popp, Markus ca. 20./21. Jh, et al. And the Boat Goes Backwards. 2013.