The Hermitage :
masterpieces of the painting collections.

APA Citation

Gosudarstvennyĭ Ėrmitazh (Russia). (2004). The Hermitage: masterpieces of the painting collections. London: Scala.

MLA Citation

Gosudarstvennyĭ Ėrmitazh (Russia). The Hermitage: Masterpieces of the Painting Collections. London: Scala, 2004.

Warning: These citations may not always be complete (especially for serials).