APA (7th ed.) Citation

Warner, S. (2008). The Old Helmet, Volume I. Project Gutenberg.

Chicago Style (17th ed.) Citation

Warner, Susan. The Old Helmet, Volume I. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Warner, Susan. The Old Helmet, Volume I. Project Gutenberg, 2008.

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