APA (7th ed.) Citation

Keller, H. (1980). The art of the Impressionists / Horst Keller. Phaidon.

Chicago Style (17th ed.) Citation

Keller, Horst. The Art of the Impressionists / Horst Keller. Oxford: Phaidon, 1980.

MLA (9th ed.) Citation

Keller, Horst. The Art of the Impressionists / Horst Keller. Phaidon, 1980.

Warning: These citations may not always be 100% accurate.