Originalno: Alfred's Basic Adult Piano Course Lesson Book, Book 1. The G Major & D7 Chords for LH. Warm-Up using G, D7 & C Chords.
Prevod: Alfred je Basic Adult Piano Course Lesson Book, Book 1. Warm-Up s pomočjo G, D7. Warm-Up s pomočjo G, D7. Willard A. Palmer.