APA (7th ed.) Citation

Squareman, C. (2004). My Book of Indoor Games. Project Gutenberg.

Chicago Style (17th ed.) Citation

Squareman, Clarence. My Book of Indoor Games. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Squareman, Clarence. My Book of Indoor Games. Project Gutenberg, 2004.

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