APA (7th ed.) Citation

Gallwitz, K., & Picasso, P. (1971). Picasso at 90: The late work. Putnam.

Chicago Style (17th ed.) Citation

Gallwitz, Klaus, and Pablo Picasso. Picasso at 90: The Late Work. New York: Putnam, 1971.

MLA (9th ed.) Citation

Gallwitz, Klaus, and Pablo Picasso. Picasso at 90: The Late Work. Putnam, 1971.