Cita APA (7th ed.)
Sotheby's. (1999). Sotheby's: London, Wednesday 8 December 1999 : The Pencarrow Collection of Autographs including the Newly-Discovered Bethoven Quartet Movement. Sotheby's.
Cita Chicago (17th ed.)
Sotheby's. Sotheby's: London, Wednesday 8 December 1999 : The Pencarrow Collection of Autographs Including the Newly-Discovered Bethoven Quartet Movement. Londres, Inglaterra: Sotheby's, 1999.
Cita MLA (9th ed.)
Sotheby's. Sotheby's: London, Wednesday 8 December 1999 : The Pencarrow Collection of Autographs Including the Newly-Discovered Bethoven Quartet Movement. Sotheby's, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.