Cita APA (7a ed.)
Sotheby's. (1999). Sotheby's: London, Tuesday 9 November 1999 : Important Watches, Clocks, Barometers, Mechanical Musical and Scientific Instruments. Sotheby's.
Cita estilo Chicago (17a ed.)
Sotheby's. Sotheby's: London, Tuesday 9 November 1999 : Important Watches, Clocks, Barometers, Mechanical Musical and Scientific Instruments. Londres, Inglaterra: Sotheby's, 1999.
Cita MLA (9a ed.)
Sotheby's. Sotheby's: London, Tuesday 9 November 1999 : Important Watches, Clocks, Barometers, Mechanical Musical and Scientific Instruments. Sotheby's, 1999.
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