APA (7th ed.) Citation

Boatwright, H. (1956). Introduction to the theory of music. W. W. Norton.

Chicago Style (17th ed.) Citation

Boatwright, Howard. Introduction to the Theory of Music. New York: W. W. Norton, 1956.

MLA (9th ed.) Citation

Boatwright, Howard. Introduction to the Theory of Music. W. W. Norton, 1956.