Picasso at 90 : : The Late Work.

MLA

Gallwitz, Klaus. Picasso At 90 : The Late Work. London: Weidenfeld and Nicolson, 1971.

APA

Gallwitz, K. (1971). Picasso at 90 : The Late Work. London: Weidenfeld and Nicolson.

Chicago

Gallwitz, Klaus Picasso At 90: The Late Work. London: Weidenfeld and Nicolson, 1971.