APA (7th ed.) Citation

Backus, J. (1977). The acoustical foundations of music (2nd ed.). Norton.

Chicago Style (17th ed.) Citation

Backus, John. The Acoustical Foundations of Music. 2nd ed. New York: Norton, 1977.

MLA (9th ed.) Citation

Backus, John. The Acoustical Foundations of Music. 2nd ed. Norton, 1977.