Kraft, L. (1976). Gradus: An integrated approach to harmony, counterpoint, and analysis. Norton.
Chicago (17e ed.) BronvermeldingKraft, Leo. Gradus: An Integrated Approach to Harmony, Counterpoint, and Analysis. New York: Norton, 1976.
MLA (9e ed.) BronvermeldingKraft, Leo. Gradus: An Integrated Approach to Harmony, Counterpoint, and Analysis. Norton, 1976.
Let op: Deze citaties zijn niet altijd 100% accuraat.