Cita APA (7th ed.)

Pohlmann, U., & Koopmann, J. (2011). Unglaublich: Incredibile.

Cita Chicago (17th ed.)

Pohlmann, Ulrich, i Jörg Koopmann. Unglaublich: Incredibile. München, 2011.

Cita MLA (8th ed.)

Pohlmann, Ulrich, i Jörg Koopmann. Unglaublich: Incredibile. 2011.