APA (7th ed.) Citation

Clay. (1978). Modern art 1890-1918. Octopus Books.

Chicago Style (17th ed.) Citation

Clay. Modern Art 1890-1918. London: Octopus Books, 1978.

MLA (8th ed.) Citation

Clay. Modern Art 1890-1918. Octopus Books, 1978.

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