APA (7th ed.) Citation

Rachele, R. (1996). Overtone singing study guide (2. Ed.). Cryptic Voices.

Chicago Style (17th ed.) Citation

Rachele, Rollin. Overtone Singing Study Guide. 2. Ed. Amsterdam: Cryptic Voices, 1996.

MLA (9th ed.) Citation

Rachele, Rollin. Overtone Singing Study Guide. 2. Ed. Cryptic Voices, 1996.