APA (7th ed.) Citation

POWELL, J. (2010). How Music Works: A Listener's guid to Harmony, Keys, Broken Chords Perfect Pitch. Penguin Group.

Chicago Style (17th ed.) Citation

POWELL, John. How Music Works: A Listener's Guid to Harmony, Keys, Broken Chords Perfect Pitch. Penguin Group, 2010.

MLA (8th ed.) Citation

POWELL, John. How Music Works: A Listener's Guid to Harmony, Keys, Broken Chords Perfect Pitch. Penguin Group, 2010.

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