Luckhardt, U. (1989). Lyonel Feininger.
Cita Chicago (17th ed.)Luckhardt, Ulrich. Lyonel Feininger. München, 1989.
Cita MLA (8th ed.)Luckhardt, Ulrich. Lyonel Feininger. 1989.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)