Cita APA (7th ed.)

Helfer, J. (1994). Du Idiot: Roman / Joachim Helfer. Piper.

Cita Chicago (17th ed.)

Helfer, Joachim. Du Idiot: Roman / Joachim Helfer. München: Piper, 1994.

Cita MLA (8th ed.)

Helfer, Joachim. Du Idiot: Roman / Joachim Helfer. Piper, 1994.