Originalus: Threshold to Music, Level Two Materials. Threshold to Music, Level Two Materials. Threshold to Music. Grades 4-7.
Vertimas: Slenkstis Muzika, antro lygio medžiagos. Lygiai 4-7. Eleanor Kidd. Slenkstis Muzika, antro lygio medžiagos. Lygiai 4-7. Klasė.