APA (7th ed.) Citation

Fenn, G. M. (2010). The Sapphire Cross. Project Gutenberg.

Chicago Style (17th ed.) Citation

Fenn, George Manville. The Sapphire Cross. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Fenn, George Manville. The Sapphire Cross. Project Gutenberg, 2010.

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