Benward, B. (1969). Workbook in ear training (2nd ed.). Wm. C. Brown.
Cita Chicago (17th ed.)Benward, Bruce. Workbook in Ear Training. 2nd ed. Dubuque: Wm. C. Brown, 1969.
Cita MLA (9th ed.)Benward, Bruce. Workbook in Ear Training. 2nd ed. Wm. C. Brown, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.