APA (7th ed.) Citation

Lehmann, L., & Aldrich, R. (2006). How to Sing [Meine Gesangskunst]. Project Gutenberg.

Chicago Style (17th ed.) Citation

Lehmann, Lilli, and Richard Aldrich. How to Sing [Meine Gesangskunst]. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Lehmann, Lilli, and Richard Aldrich. How to Sing [Meine Gesangskunst]. Project Gutenberg, 2006.

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