APA Zitierstil

Sotheby's. (1997). German and Austrian 20th century art. Sotheby's.

Chicago Zitierstil

Sotheby's. German and Austrian 20th Century Art. London: Sotheby's, 1997.

MLA Zitierstil

Sotheby's. German and Austrian 20th Century Art. Sotheby's, 1997.