APA (7th ed.) Citation

Luckiesh, M. (2011). Visual Illusions Their Causes, Characteristics and Applications. Project Gutenberg.

Chicago Style (17th ed.) Citation

Luckiesh, Matthew. Visual Illusions Their Causes, Characteristics and Applications. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Luckiesh, Matthew. Visual Illusions Their Causes, Characteristics and Applications. Project Gutenberg, 2011.

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