Art of this century :
the Guggenheim Museum and its collection.

APA Citation

Solomon R. Guggenheim Museum. (1993). Art of this century: the Guggenheim Museum and its collection. New York: Solomom R. Guggenheim Foundation : Distributed by Rizzoli International.

MLA Citation

Solomon R. Guggenheim Museum. Art of This Century: the Guggenheim Museum And Its Collection. New York: Solomom R. Guggenheim Foundation : Distributed by Rizzoli International, 1993.

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