Original: Groovin' Easy. Ramon Ricker. Groovin' Easy composed by Ramon Ricker. 11. Reading Key Jazz Rhythms, Etude 7.
Traducció: Groovin 'Easy. Lectura Clau Jazz Rhythms, Etude 7. Groovin 'Easy composta per Ramón Ricker. Groovin 'Easy Sèries. AV.9803001.