Twenty Works by Joaquin Torres-García from the Estate of Royal S. Marks : : Auction New York, Sotheby, 20 november 1989.
MLA
De Torres, Cecilia. Twenty Works by Joaquin Torres-garcía From the Estate of Royal S. Marks : Auction New York, Sotheby, 20 November 1989. New York City: Sotheby, 1989.
APA
De Torres, C. (1989). Twenty Works by Joaquin Torres-García from the Estate of Royal S. Marks : Auction New York, Sotheby, 20 november 1989. New York City: Sotheby.
Chicago
De Torres, Cecilia Twenty Works by Joaquin Torres-García From the Estate of Royal S. Marks: Auction New York, Sotheby, 20 November 1989. New York City: Sotheby, 1989.