(1991). Brockhaus-Enzyklopädie. Brockhaus.
Cita Chicago (17th ed.)Brockhaus-Enzyklopädie. Mannheim: Brockhaus, 1991.
Cita MLA (8th ed.)Brockhaus-Enzyklopädie. Brockhaus, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)