APA (7th ed.) Citation

Ade, G., & Kerr, G. F. (2004). The Slim Princess. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ade, George, and George F. Kerr. The Slim Princess. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Ade, George, and George F. Kerr. The Slim Princess. Project Gutenberg, 2004.

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