APA (7th ed.) Citation

Christensen, T. The History of Music Theory. Gesellschaft für Musiktheorie (GMTH).

Chicago Style (17th ed.) Citation

Christensen, Thomas. The History of Music Theory. Gesellschaft für Musiktheorie (GMTH).

MLA (9th ed.) Citation

Christensen, Thomas. The History of Music Theory. Gesellschaft für Musiktheorie (GMTH).

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