APA (7th ed.) Citation

Ryan, M. (2010). What Every Singer Should Know. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ryan, Millie. What Every Singer Should Know. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Ryan, Millie. What Every Singer Should Know. Project Gutenberg, 2010.

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