Berkowitz, S. (1975). Improvisation through keyboard harmony. Prentice-Hall.
Dyfyniad Arddull ChicagoBerkowitz, Sol. Improvisation Through Keyboard Harmony. Englewood Cliffs, N.J: Prentice-Hall, 1975.
Dyfyniad MLABerkowitz, Sol. Improvisation Through Keyboard Harmony. Prentice-Hall, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.