Spencer, P. (1983). The practice of harmony. Prentice-Hall.
Cita Chicago (17th ed.)Spencer, Peter. The Practice of Harmony. Englewood Cliffs, NJ: Prentice-Hall, 1983.
Cita MLA (9th ed.)Spencer, Peter. The Practice of Harmony. Prentice-Hall, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.