Sotheby's SA (Genf). (1984). A collection of portrait miniatures from the estate of King Umberto II of Italy: Day of sale Monday, 12th November 1984, Hôtel des Bergues, Geneva, Sotheby's S.A., Geneva. Sotheby's S.A.
Chicago Style (17th ed.) CitationSotheby's SA (Genf). A Collection of Portrait Miniatures from the Estate of King Umberto II of Italy: Day of Sale Monday, 12th November 1984, Hôtel Des Bergues, Geneva, Sotheby's S.A., Geneva. Genf: Sotheby's S.A, 1984.
MLA (9th ed.) CitationSotheby's SA (Genf). A Collection of Portrait Miniatures from the Estate of King Umberto II of Italy: Day of Sale Monday, 12th November 1984, Hôtel Des Bergues, Geneva, Sotheby's S.A., Geneva. Sotheby's S.A, 1984.
Warning: These citations may not always be 100% accurate.