APA (7th ed.) Citation

Hofmann, J. (2012). Piano Playing: With Piano Questions Answered. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hofmann, Josef. Piano Playing: With Piano Questions Answered. Project Gutenberg, 2012.

MLA (9th ed.) Citation

Hofmann, Josef. Piano Playing: With Piano Questions Answered. Project Gutenberg, 2012.

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