APA (7th ed.) Citation

Kettner, B. (1950). Johann Sebastian Bach. Ruhfus.

Chicago Style (17th ed.) Citation

Kettner, Benno. Johann Sebastian Bach. Dortmund: Ruhfus, 1950.

MLA (9th ed.) Citation

Kettner, Benno. Johann Sebastian Bach. Ruhfus, 1950.

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