APA (7th ed.) Citation

Piekenbrock, A., & Kienle, F. (2013). ZPO-Examinatorium. Vahlen.

Chicago Style (17th ed.) Citation

Piekenbrock, Andreas, and Florian Kienle. ZPO-Examinatorium. München: Vahlen, 2013.

MLA (9th ed.) Citation

Piekenbrock, Andreas, and Florian Kienle. ZPO-Examinatorium. Vahlen, 2013.

Warning: These citations may not always be 100% accurate.