APA (7th ed.) Citation

Clifford, C. R. (2008). Color Value. Project Gutenberg.

Chicago Style (17th ed.) Citation

Clifford, C. R. Color Value. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Clifford, C. R. Color Value. Project Gutenberg, 2008.

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