Burda, Hubert. FOCUS. FOCUS Magazin-Verl.
Cita Chicago (17th ed.)Burda, Hubert. FOCUS. München: FOCUS Magazin-Verl.
Cita MLA (8th ed.)Burda, Hubert. FOCUS. FOCUS Magazin-Verl.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)