Holroyd, C. (1930). The national gallery-London The central Italian schools. George Newnes.
Citazione stile Chigago Style (17a edizione)Holroyd, Charles. The National Gallery-London The Central Italian Schools. Londres: George Newnes, 1930.
Citatione MLA (9a ed.)Holroyd, Charles. The National Gallery-London The Central Italian Schools. George Newnes, 1930.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.