Hofmann, W. (1977). Hamburger Kunsthalle. Westermann.
Cita Chicago (17th ed.)Hofmann, Werner. Hamburger Kunsthalle. Braunschweig: Westermann, 1977.
Cita MLA (8th ed.)Hofmann, Werner. Hamburger Kunsthalle. Westermann, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.