MLA

Smith, Robert. Harmonics Or the Philosophy of Musical Sounds. 2e New York: Da Capo Press, 1966.

APA

Smith, R. (1966). Harmonics or the philosophy of musical sounds. 2e New York: Da Capo Press.

Chicago

Smith, Robert Harmonics Or the Philosophy of Musical Sounds. 2e New York: Da Capo Press, 1966.