APA (7th ed.) Citation

Timken Art Gallery, Mongan, A., & Mongan, E. (1969). European paintings in the Timken Art Gallery. Putnam Foundation.

Chicago Style (17th ed.) Citation

Timken Art Gallery, Agnes Mongan, and Elizabeth Mongan. European Paintings in the Timken Art Gallery. San Diego, Calif.: Putnam Foundation, 1969.

MLA (9th ed.) Citation

Timken Art Gallery, et al. European Paintings in the Timken Art Gallery. Putnam Foundation, 1969.