Paszkowiak, A. (1971). Erfurt. Brockhaus.
Cita Chicago (17th ed.)Paszkowiak, Alfred. Erfurt. Leipzig: Brockhaus, 1971.
Cita MLA (8th ed.)Paszkowiak, Alfred. Erfurt. Brockhaus, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)