Cita APA (7th ed.)

Gregorovius, F. (1937). Lucrezia Borgia: Ferdinand Gregorovius. Bernina-Verl..

Cita Chicago (17th ed.)

Gregorovius, Ferdinand. Lucrezia Borgia: Ferdinand Gregorovius. Wien [u.a.]: Bernina-Verl., 1937.

Cita MLA (8th ed.)

Gregorovius, Ferdinand. Lucrezia Borgia: Ferdinand Gregorovius. Bernina-Verl., 1937.