Cita APA (7th ed.)

Zack. (2012). Bike boy rides again: By Zack. [Pseud., d. i.: Oliver Frey] (2. Auflage.). Gmünder.

Cita Chicago (17th ed.)

Zack. Bike Boy Rides Again: By Zack. [Pseud., D. I.: Oliver Frey]. 2. Auflage. Berlin: Gmünder, 2012.

Cita MLA (8th ed.)

Zack. Bike Boy Rides Again: By Zack. [Pseud., D. I.: Oliver Frey]. 2. Auflage. Gmünder, 2012.