Kraft, L. (1976). Gradus - Book II An integrated approach to harmony, counterpoint, and analysis. W. W. Norton & Company Inc.
Lua i Stíl Chicago (17ú heag.)Kraft, Leo. Gradus - Book II An Integrated Approach to Harmony, Counterpoint, and Analysis. W. W. Norton & Company Inc, 1976.
Lua MLA (8ú heag.)Kraft, Leo. Gradus - Book II An Integrated Approach to Harmony, Counterpoint, and Analysis. W. W. Norton & Company Inc, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.