APA (7th ed.) Citation

Crowest, F. J. (2012). Advice to Singers. Project Gutenberg.

Chicago Style (17th ed.) Citation

Crowest, Frederick James. Advice to Singers. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Crowest, Frederick James. Advice to Singers. Project Gutenberg, 2012.

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